diff --git a/counterexamples/divisions/division_area/bad-is-land.yaml b/counterexamples/divisions/division_area/bad-is-land.yaml
new file mode 100644
index 00000000..d83b8b2f
--- /dev/null
+++ b/counterexamples/divisions/division_area/bad-is-land.yaml
@@ -0,0 +1,16 @@
+---
+id: counterexample:division_area:bad-is-land
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_area
+  version: 0
+  subtype: country
+  division_id: counterexample:division_boundary:some-division
+  is_land: yes
+  country: ZZ
+  ext_expected_errors:
+    - "is_land/type]: got string, want boolean"
diff --git a/counterexamples/divisions/division_area/bad-is-territorial.yaml b/counterexamples/divisions/division_area/bad-is-territorial.yaml
new file mode 100644
index 00000000..31282ee4
--- /dev/null
+++ b/counterexamples/divisions/division_area/bad-is-territorial.yaml
@@ -0,0 +1,17 @@
+---
+id: counterexample:division_area:bad-is-territorial
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_area
+  version: 0
+  subtype: country
+  division_id: counterexample:division_boundary:some-division
+  is_territorial: no
+  is_land: true
+  country: ZZ
+  ext_expected_errors:
+    - "is_territorial/type]: got string, want boolean"
diff --git a/counterexamples/divisions/division_area/bad-missing-is-land.yaml b/counterexamples/divisions/division_area/bad-missing-is-land.yaml
new file mode 100644
index 00000000..3c701834
--- /dev/null
+++ b/counterexamples/divisions/division_area/bad-missing-is-land.yaml
@@ -0,0 +1,14 @@
+---
+id: counterexample:division_area:bad-is-territorial
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_area
+  version: 0
+  subtype: country
+  division_id: counterexample:division_boundary:some-division
+  is_territorial: false
+  country: ZZ
\ No newline at end of file
diff --git a/counterexamples/divisions/division_boundary/bad-is-land.yaml b/counterexamples/divisions/division_boundary/bad-is-land.yaml
new file mode 100644
index 00000000..11835e6a
--- /dev/null
+++ b/counterexamples/divisions/division_boundary/bad-is-land.yaml
@@ -0,0 +1,18 @@
+---
+id: counterexample:division_boundary:bad-is-land
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_boundary
+  version: 0
+  subtype: country
+  division_ids: ["example:division:country:left", "example:division:country:right"]
+  is_land: yes
+  is_territorial: false
+  class: land
+  country: ZZ
+  ext_expected_errors:
+    - "is_land/type]: got string, want boolean"
diff --git a/counterexamples/divisions/division_boundary/bad-is-territorial.yaml b/counterexamples/divisions/division_boundary/bad-is-territorial.yaml
new file mode 100644
index 00000000..4ee7d2af
--- /dev/null
+++ b/counterexamples/divisions/division_boundary/bad-is-territorial.yaml
@@ -0,0 +1,18 @@
+---
+id: counterexample:division_boundary:bad-is-territorial
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_boundary
+  version: 0
+  subtype: country
+  division_ids: ["example:division:country:left", "example:division:country:right"]
+  class: land
+  is_territorial: no
+  is_land: true
+  country: ZZ
+  ext_expected_errors:
+    - "is_territorial/type]: got string, want boolean"
\ No newline at end of file
diff --git a/counterexamples/divisions/division_boundary/bad-not-both.yaml b/counterexamples/divisions/division_boundary/bad-not-both.yaml
new file mode 100644
index 00000000..bee287fe
--- /dev/null
+++ b/counterexamples/divisions/division_boundary/bad-not-both.yaml
@@ -0,0 +1,17 @@
+---
+id: example:division_boundary:is_land:country:us
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_boundary
+  version: 1
+  subtype: country
+  is_land: true
+  is_territorial: true
+  class: land
+  division_ids: ["example:division:country:left", "example:division:country:right"]
+  ext_expected_errors:
+    - "division_boundary.yaml#/properties/properties/oneOf]: oneOf failed, subschemas 0, 1 matched"
\ No newline at end of file
diff --git a/counterexamples/divisions/division_boundary/missing-class.yaml b/counterexamples/divisions/division_boundary/missing-class.yaml
index 1f353099..05275403 100644
--- a/counterexamples/divisions/division_boundary/missing-class.yaml
+++ b/counterexamples/divisions/division_boundary/missing-class.yaml
@@ -9,6 +9,8 @@ properties:
   type: division_boundary
   version: 0
   subtype: macroregion
+  is_territorial: true
+  is_land: false
   division_ids: ["example:division:country:left", "example:division:country:right"]
   ext_expected_errors:
     - "missing property 'class'"
diff --git a/counterexamples/divisions/division_boundary/missing-division_ids.yaml b/counterexamples/divisions/division_boundary/missing-division_ids.yaml
index 4fd4b8b8..12e99fb8 100644
--- a/counterexamples/divisions/division_boundary/missing-division_ids.yaml
+++ b/counterexamples/divisions/division_boundary/missing-division_ids.yaml
@@ -9,6 +9,8 @@ properties:
   type: division_boundary
   version: 0
   class: land
+  is_territorial: false
+  is_land: true
   subtype: macrocounty
   ext_expected_errors:
     - "missing property 'division_ids'"
diff --git a/counterexamples/divisions/division_boundary/missing-subtype.yaml b/counterexamples/divisions/division_boundary/missing-subtype.yaml
index 76aea6ea..b06c8106 100644
--- a/counterexamples/divisions/division_boundary/missing-subtype.yaml
+++ b/counterexamples/divisions/division_boundary/missing-subtype.yaml
@@ -9,6 +9,8 @@ properties:
   type: division_boundary
   version: 0
   class: land
+  is_territorial: false
+  is_land: true
   division_ids: ["example:division:country:left", "example:division:country:right"]
   ext_expected_errors:
     - "missing property 'subtype'"
diff --git a/examples/divisions/division_area/country_land.yaml b/examples/divisions/division_area/country_land.yaml
index 07fa30ab..f7620a99 100644
--- a/examples/divisions/division_area/country_land.yaml
+++ b/examples/divisions/division_area/country_land.yaml
@@ -304,6 +304,8 @@ properties:
   version: 0
   subtype: country
   class: land
+  is_land: true
+  is_territorial: false
   division_id: example:division:country:us
   names:
     primary: United States
diff --git a/examples/divisions/division_area/country_maritime.yaml b/examples/divisions/division_area/country_maritime.yaml
index e95ef17b..6da93d96 100644
--- a/examples/divisions/division_area/country_maritime.yaml
+++ b/examples/divisions/division_area/country_maritime.yaml
@@ -78,6 +78,8 @@ properties:
   version: 0
   subtype: country
   class: maritime
+  is_territorial: true
+  is_land: false
   division_id: example:division:country:fi
   names:
     primary: Suomi
diff --git a/examples/divisions/division_area/is_land.yaml b/examples/divisions/division_area/is_land.yaml
new file mode 100644
index 00000000..6ade21cb
--- /dev/null
+++ b/examples/divisions/division_area/is_land.yaml
@@ -0,0 +1,312 @@
+---
+id: example:division_area:is_land:country:us
+type: Feature
+geometry:
+  type: MultiPolygon
+  coordinates: [
+    [
+      [
+        [-170.6290015, 25.3053671],
+        [-170.4076134, 25.5082632],
+        [-170.6300336, 25.7076006],
+        [-170.8506754, 25.5056948],
+        [-170.6290015, 25.3053671]
+      ]
+    ],
+    [
+      [
+        [-171.7380245, 25.555318],
+        [-171.4949943, 25.7747795],
+        [-171.726725, 25.9865667],
+        [-171.9674222, 25.7845748],
+        [-171.7380245, 25.555318]
+      ]
+    ],
+    [
+      [
+        [-174.0155727, 25.8411597],
+        [-173.7437151, 26.0119599],
+        [-173.905507, 26.2639004],
+        [-174.2280618, 26.0816774],
+        [-174.0155727, 25.8411597]
+      ]
+    ],
+    [
+      [
+        [-175.9506918, 27.5543172],
+        [-175.5545765, 27.7281369],
+        [-175.6295776, 28.1237431],
+        [-176.1866168, 27.9330153],
+        [-175.9506918, 27.5543172]
+      ]
+    ],
+    [
+      [
+        [-166.1182936, 23.4254685],
+        [-165.8702478, 23.8636297],
+        [-166.3767961, 24.0561939],
+        [-166.5303209, 23.7815879],
+        [-166.1182936, 23.4254685]
+      ]
+    ],
+    [
+      [
+        [-167.9975573, 24.7968943],
+        [-167.778217, 25.0023686],
+        [-168.005803, 25.20088],
+        [-168.2206497, 24.9967937],
+        [-167.9975573, 24.7968943]
+      ]
+    ],
+    [
+      [
+        [-157.4082814, 55.576068],
+        [-157.1024297, 55.6733491],
+        [-157.0908436, 55.8696588],
+        [-157.7232999, 55.870247],
+        [-157.4082814, 55.576068]
+      ]
+    ],
+    [
+      [
+        [-155.6071465, 55.55087],
+        [-155.2980807, 56.0385909],
+        [-156.1270413, 55.9006965],
+        [-156.0182299, 55.6525826],
+        [-155.6071465, 55.55087]
+      ]
+    ],
+    [
+      [
+        [-178.3063127, 28.1837783],
+        [-178.0577766, 28.4309636],
+        [-178.3589518, 28.655272],
+        [-178.60056, 28.4012455],
+        [-178.3063127, 28.1837783]
+      ]
+    ],
+    [
+      [
+        [-179.1390989, 51.0070029],
+        [-173.0611771, 51.8159234],
+        [-171.9740685, 52.3514335],
+        [-178.9229631, 52.0275532],
+        [-179.1390989, 51.0070029]
+      ]
+    ],
+    [
+      [
+        [-180, 51.7940888],
+        [-179.8836979, 51.9764894],
+        [-180, 52.138489],
+        [-180, 51.8434509],
+        [-180, 51.7940888]
+      ]
+    ],
+    [
+      [
+        [-170.3952428, 56.8431693],
+        [-169.6956679, 57.0307607],
+        [-169.5801239, 57.2365744],
+        [-170.6525321, 57.3494254],
+        [-170.3952428, 56.8431693]
+      ]
+    ],
+    [
+      [
+        [-169.5771945, 56.3323838],
+        [-169.1322924, 56.6737641],
+        [-170.1288343, 56.6777795],
+        [-170.0250438, 56.4580184],
+        [-169.5771945, 56.3323838]
+      ]
+    ],
+    [
+      [
+        [-168.0561273, 64.76067],
+        [-167.5930406, 65.0286657],
+        [-168.5591053, 65.007885],
+        [-168.4482776, 64.8327172],
+        [-168.0561273, 64.76067]
+      ]
+    ],
+    [
+      [
+        [-156.6720152, 20.3000654],
+        [-155.800111, 20.8826396],
+        [-158.455088, 21.6943824],
+        [-158.2462379, 21.1430868],
+        [-156.6720152, 20.3000654]
+      ]
+    ],
+    [
+      [
+        [-160.5398128, 21.4482644],
+        [-159.3028431, 21.7124132],
+        [-159.1241278, 22.2798801],
+        [-160.2161715, 22.1993854],
+        [-160.5398128, 21.4482644]
+      ]
+    ],
+    [
+      [
+        [-161.9236658, 22.8550496],
+        [-161.6972866, 23.0665997],
+        [-161.9360903, 23.2652845],
+        [-162.1455351, 23.0568827],
+        [-161.9236658, 22.8550496]
+      ]
+    ],
+    [
+      [
+        [-164.7000199, 23.3734366],
+        [-164.4760626, 23.575844],
+        [-164.7056774, 23.7796906],
+        [-164.9238496, 23.5726775],
+        [-164.7000199, 23.3734366]
+      ]
+    ],
+    [
+      [
+        [-155.6810194, 18.7091718],
+        [-154.595509, 19.5434371],
+        [-155.877534, 20.4681176],
+        [-156.2732568, 19.7049213],
+        [-155.6810194, 18.7091718]
+      ]
+    ],
+    [
+      [
+        [-82.8732511, 24.4116731],
+        [-82.5948517, 24.5902399],
+        [-82.7300073, 24.8395704],
+        [-83.153058, 24.6776636],
+        [-82.8732511, 24.4116731]
+      ]
+    ],
+    [
+      [
+        [-81.8773353, 24.2520071],
+        [-68.1545602, 47.3251568],
+        [-82.6797222, 41.6765556],
+        [-84.129, 46.5305],
+        [-94.9573889, 49.3701944],
+        [-125.0271096, 48.4630615],
+        [-119.6795205, 33.0665347],
+        [-97.40561, 25.83764],
+        [-84.0549877, 29.8627705],
+        [-81.8773353, 24.2520071]
+      ]
+    ],
+    [
+      [
+        [179.2356588, 51.1468561],
+        [178.6498473, 52.169477],
+        [176.8813625, 51.9348227],
+        [177.1853792, 51.6303915],
+        [179.2356588, 51.1468561]
+      ]
+    ],
+    [
+      [
+        [179.6302237, 51.6862391],
+        [180, 52.1384488],
+        [179.2193828, 52.1042624],
+        [179.2227021, 51.833522],
+        [179.6302237, 51.6862391]
+      ]
+    ],
+    [
+      [
+        [175.915408, 52.1325238],
+        [176.2623207, 52.4572425],
+        [175.5671255, 52.4969017],
+        [175.5586568, 52.2829505],
+        [175.915408, 52.1325238]
+      ]
+    ],
+    [
+      [
+        [173.6474085, 52.1472948],
+        [174.8392132, 52.6878183],
+        [172.1158739, 52.9881155],
+        [173.132385, 52.2506975],
+        [173.6474085, 52.1472948]
+      ]
+    ],
+    [
+      [
+        [-146.3855284, 59.1843829],
+        [-145.9234279, 59.3169728],
+        [-145.8952803, 59.5345003],
+        [-146.6535985, 59.6545361],
+        [-146.3855284, 59.1843829]
+      ]
+    ],
+    [
+      [
+        [-171.2797217, 52.2444061],
+        [-145.9885379, 60.1761058],
+        [-130.003485, 56.008075],
+        [-141.00198, 60.3063692],
+        [-140.7523256, 69.8283004],
+        [-156.6515529, 71.581159],
+        [-169.0485821, 65.4690061],
+        [-161.2500247, 63.8004626],
+        [-167.6542464, 59.9434356],
+        [-158.0753114, 57.7475562],
+        [-171.2797217, 52.2444061]
+      ],
+      [
+        [-153.8125943, 58.0958144],
+        [-153.5773523, 58.3547948],
+        [-153.3559904, 58.4231127],
+        [-153.6200524, 58.260124],
+        [-153.8125943, 58.0958144]
+      ],
+      [
+        [-153.1820044, 58.5355625],
+        [-153.1751501, 58.5480609],
+        [-153.1384992, 58.5678286],
+        [-153.1470249, 58.5552926],
+        [-153.1820044, 58.5355625]
+      ],
+      [
+        [-152.8741566, 58.7660471],
+        [-152.9882543, 59.4696836],
+        [-152.1322999, 60.0079718],
+        [-152.330171, 59.1676267],
+        [-152.8741566, 58.7660471]
+      ]
+    ],
+    [
+      [
+        [-172.7696055, 59.9963072],
+        [-171.8272619, 60.3517559],
+        [-173.4406927, 60.7880772],
+        [-173.4413238, 60.4223353],
+        [-172.7696055, 59.9963072]
+      ]
+    ],
+    [
+      [
+        [-169.6463302, 62.736964],
+        [-168.2509717, 63.332816],
+        [-172.2753008, 63.6094455],
+        [-172.0058757, 63.2057208],
+        [-169.6463302, 62.736964]
+      ]
+    ]
+  ]
+properties:
+  theme: divisions
+  type: division_area
+  subtype: country
+  is_land: true
+  is_territorial: false
+  country: US
+  version: 0
+  class: land
+  division_id: example:division:country:us
+  names:
+    primary: United States
\ No newline at end of file
diff --git a/examples/divisions/division_area/is_territorial.yaml b/examples/divisions/division_area/is_territorial.yaml
new file mode 100644
index 00000000..18b8edda
--- /dev/null
+++ b/examples/divisions/division_area/is_territorial.yaml
@@ -0,0 +1,86 @@
+---
+id: example:division_area:is_territorial:country:fi
+type: Feature
+geometry:
+  type: Polygon
+  coordinates:
+    - - [24.1149326, 65.1739343]
+      - [22.965913, 64.2461008]
+      - [22.9611467, 64.2200974]
+      - [20.1690736, 63.1704]
+      - [20.1635668, 63.1664346]
+      - [20.7968544, 62.025131]
+      - [20.8113847, 61.9869932]
+      - [20.7731398, 61.1334808]
+      - [20.7714495, 61.1269079]
+      - [19.2266918, 60.612911]
+      - [19.2134721, 60.610071]
+      - [19.0881715, 60.2028008]
+      - [19.0832, 60.1916833]
+      - [20.2889918, 59.4641746]
+      - [20.2949231, 59.4620801]
+      - [27.4560114, 60.223152]
+      - [27.4566541, 60.2232587]
+      - [31.5848283, 62.9070414]
+      - [31.5867071, 62.9087094]
+      - [29.9792123, 63.7533602]
+      - [29.9718903, 63.7571676]
+      - [30.5280169, 64.0488769]
+      - [30.5535801, 64.1016818]
+      - [29.6152439, 64.9174367]
+      - [29.6110374, 64.9273269]
+      - [29.7539876, 65.6093614]
+      - [29.7218642, 65.6370848]
+      - [30.1204275, 65.7484154]
+      - [30.1193675, 65.7521935]
+      - [29.0335178, 66.9246111]
+      - [29.0331668, 66.9255206]
+      - [30.0120699, 67.6649442]
+      - [30.0170617, 67.6735368]
+      - [28.7084312, 68.185236]
+      - [28.6461349, 68.1963023]
+      - [28.4446345, 68.5223038]
+      - [28.433932, 68.539671]
+      - [28.7947914, 68.8607869]
+      - [28.8007886, 68.8692833]
+      - [28.4291269, 68.9077986]
+      - [28.4157885, 68.9154506]
+      - [29.2950412, 69.4498488]
+      - [29.3364956, 69.4783227]
+      - [27.9604365, 70.089821]
+      - [27.9593778, 70.0921111]
+      - [25.9751031, 69.7083076]
+      - [25.9712362, 69.707112]
+      - [25.7752318, 69.0142604]
+      - [25.7746414, 69.0134805]
+      - [24.9050854, 68.5700172]
+      - [24.9031658, 68.5545918]
+      - [22.4047437, 68.721914]
+      - [22.3745217, 68.7166666]
+      - [21.6591391, 69.2559218]
+      - [21.6270859, 69.2765883]
+      - [20.5523258, 69.0600767]
+      - [20.5486365, 69.0599735]
+      - [23.6496681, 67.9616712]
+      - [23.6511967, 67.9607085]
+      - [23.3944185, 67.4851454]
+      - [23.3944231, 67.4842768]
+      - [23.9945079, 66.8234885]
+      - [23.9956629, 66.822049]
+      - [23.6455681, 66.3021131]
+      - [23.6456201, 66.3013903]
+      - [24.1526454, 65.8629123]
+      - [24.152978, 65.862572]
+      - [24.1149326, 65.1739343]
+properties:
+  theme: divisions
+  type: division_area
+  subtype: country
+  is_territorial: true
+  is_land: false
+  country: FI
+  version: 0
+  class: land
+  division_id: example:division:country:fi
+  names:
+    primary: Finland
diff --git a/examples/divisions/division_area/region_land.yaml b/examples/divisions/division_area/region_land.yaml
index 0e5e2002..6fa85786 100644
--- a/examples/divisions/division_area/region_land.yaml
+++ b/examples/divisions/division_area/region_land.yaml
@@ -73,6 +73,8 @@ properties:
   version: 0
   subtype: region
   class: land
+  is_land: true
+  is_territorial: false
   division_id: example:division:country:it
   names:
     primary: Umbria
diff --git a/examples/divisions/division_boundary/disputed.yaml b/examples/divisions/division_boundary/disputed.yaml
index 5a406a15..525a80bb 100644
--- a/examples/divisions/division_boundary/disputed.yaml
+++ b/examples/divisions/division_boundary/disputed.yaml
@@ -10,6 +10,8 @@ properties:
   version: 1
   subtype: country
   class: land
+  is_land: true
+  is_territorial: false
   division_ids: ["example:division:country:left", "example:division:country:right"]
   is_disputed: true
   perspectives:
diff --git a/examples/divisions/division_boundary/disputed_both.yaml b/examples/divisions/division_boundary/disputed_both.yaml
index 781fc23a..ee491390 100644
--- a/examples/divisions/division_boundary/disputed_both.yaml
+++ b/examples/divisions/division_boundary/disputed_both.yaml
@@ -10,6 +10,8 @@ properties:
   version: 1
   subtype: country
   class: land
+  is_land: true
+  is_territorial: false
   division_ids: ["example:division:country:left", "example:division:country:right"]
   is_disputed: true
   perspectives:
diff --git a/examples/divisions/division_boundary/is_land.yaml b/examples/divisions/division_boundary/is_land.yaml
new file mode 100644
index 00000000..418a89f9
--- /dev/null
+++ b/examples/divisions/division_boundary/is_land.yaml
@@ -0,0 +1,15 @@
+---
+id: example:division_boundary:is_land:country:us
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_boundary
+  version: 1
+  subtype: country
+  is_land: true
+  is_territorial: false
+  class: land
+  division_ids: ["example:division:country:left", "example:division:country:right"]
\ No newline at end of file
diff --git a/examples/divisions/division_boundary/is_territorial.yaml b/examples/divisions/division_boundary/is_territorial.yaml
new file mode 100644
index 00000000..f5d8b34b
--- /dev/null
+++ b/examples/divisions/division_boundary/is_territorial.yaml
@@ -0,0 +1,16 @@
+---
+id: example:division_boundary:is_territorial:country:fi
+
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 1], [1, 2]]
+properties:
+  theme: divisions
+  type: division_boundary
+  version: 1
+  subtype: country
+  is_territorial: true
+  is_land: false
+  class: maritime
+  division_ids: ["example:division:country:left", "example:division:country:right"]
\ No newline at end of file
diff --git a/examples/divisions/division_boundary/land_region.yaml b/examples/divisions/division_boundary/land_region.yaml
index bb7c57c5..1c9f86d0 100644
--- a/examples/divisions/division_boundary/land_region.yaml
+++ b/examples/divisions/division_boundary/land_region.yaml
@@ -10,4 +10,6 @@ properties:
   version: 1
   subtype: region
   class: land
+  is_land: true
+  is_territorial: false
   division_ids: ["example:division:region:left",  "example:division:region:right"]
diff --git a/examples/divisions/division_boundary/maritime_country.yaml b/examples/divisions/division_boundary/maritime_country.yaml
index a9e77a1a..13d73ed4 100644
--- a/examples/divisions/division_boundary/maritime_country.yaml
+++ b/examples/divisions/division_boundary/maritime_country.yaml
@@ -10,4 +10,6 @@ properties:
   version: 1
   subtype: country
   class: maritime
+  is_territorial: true
+  is_land: false
   division_ids: ["example:division:region:left",  "example:division:region:right"]
diff --git a/schema/divisions/division_area.yaml b/schema/divisions/division_area.yaml
index 76a18409..985bdd60 100644
--- a/schema/divisions/division_area.yaml
+++ b/schema/divisions/division_area.yaml
@@ -22,10 +22,17 @@ properties:     # JSON Schema: Top-level object properties.
       - "$ref": https://geojson.org/schema/MultiPolygon.json
   properties:   # GeoJSON: top-level object 'properties' property.
     unevaluatedProperties: false
-    required: [names, subtype, class, country, division_id]
+    required: [names, subtype, class, country, division_id, is_land, is_territorial]
     allOf:
       - "$ref": ../defs.yaml#/$defs/propertyContainers/overtureFeaturePropertiesContainer
       - "$ref": ../defs.yaml#/$defs/propertyContainers/namesContainer
+    anyOf:
+      - properties:
+          is_land:
+            const: true
+      - properties:
+          is_territorial:
+            const: true
     properties: # JSON Schema: properties within GeoJSON top-level object 'properties' property
       subtype: { "$ref": "./defs.yaml#/$defs/propertyDefinitions/placetype" }
       class:
@@ -36,6 +43,19 @@ properties:     # JSON Schema: Top-level object properties.
           - maritime    # The area extends beyond the coastline, in most
                         # cases to the extent of the division's
                         # territorial sea, if it has one.
+      is_land:
+        description:
+          A boolean to indicate whether or not the feature geometry represents the
+          land-clipped, non-maritime boundary. The geometry can be used for map
+          rendering, cartographic display, and similar purposes.
+        type: boolean
+      is_territorial:
+        description:
+          A boolean to indicate whether or not the feature geometry represents
+          Overture's best approximation of this place's maritime boundary. For
+          coastal places, this would tend to include the water area. The geometry
+          can be used for data processing, reverse-geocoding, and similar purposes.
+        type: boolean
       division_id:
         description:
           Division ID of the division this area belongs to.
diff --git a/schema/divisions/division_boundary.yaml b/schema/divisions/division_boundary.yaml
index 3b12aa4d..af1a380d 100644
--- a/schema/divisions/division_boundary.yaml
+++ b/schema/divisions/division_boundary.yaml
@@ -17,9 +17,16 @@ properties:     # JSON Schema: Top-level object properties.
       - "$ref": https://geojson.org/schema/MultiLineString.json
   properties:   # GeoJSON: top-level object 'properties' property.
     unevaluatedProperties: false
-    required: [subtype, class, division_ids]
+    required: [subtype, class, division_ids, is_land, is_territorial]
     allOf:
       - "$ref": ../defs.yaml#/$defs/propertyContainers/overtureFeaturePropertiesContainer
+    oneOf:
+      - properties:
+          is_land:
+            const: true
+      - properties:
+          is_territorial:
+            const: true
     properties: # JSON Schema: properties within GeoJSON top-level object 'properties' property
       subtype: { "$ref": "./defs.yaml#/$defs/propertyDefinitions/placetype" }
       class:
@@ -30,6 +37,19 @@ properties:     # JSON Schema: Top-level object properties.
 
           - maritime    # All the boundary geometry extends beyond the
                         # coastline of both associated divisions.
+      is_land:
+        description:
+          A boolean to indicate whether or not the feature geometry represents the
+          land-clipped, non-maritime boundary. The geometry can be used for map
+          rendering, cartographic display, and similar purposes.
+        type: boolean
+      is_territorial:
+        description:
+          A boolean to indicate whether or not the feature geometry represents
+          Overture's best approximation of this place's maritime boundary. For
+          coastal places, this would tend to include the water area. The geometry
+          can be used for data processing, reverse-geocoding, and similar purposes.
+        type: boolean
       division_ids:
         description:
           Identifies the two divisions to the left and right, respectively, of