Correct FIXME

README.md

@@ -744,9 +744,8 @@ Note that this also applies to arrays and objects. For example, the `to` array i
 
 Other semantic conditions that are not possible to fully express syntactically (e.g. current day of week) MUST be handled as part of Invocation execution. This is considered out of scope of the UCAN Policy language. The RECOMMENDED strategy to express constrains that involve side effects (like day of week) is to include that infromation in the argument shape for that Command (i.e. have a `"day_of_week": "friday"` field).
 
-// FIXME duplicate header
-# Validation
-[Validation]: #validation
+# Token Validation
+[Token Validation]: #token-validation
 
 Validation of a UCAN chain MAY occur at any time, but MUST occur upon receipt of an [Invocation] _prior to execution_. While proof chains exist outside of a particular delegation (and are made concrete in [UCAN Invocation]s), each delegate MUST store one or more valid delegations chains for a particular claim.