diff --git a/design/aws-ecs-scheduled-ecs-task-construct.md b/design/aws-ecs-scheduled-ecs-task-construct.md
index 76b6619d5d3b2..871b86bfc33be 100644
--- a/design/aws-ecs-scheduled-ecs-task-construct.md
+++ b/design/aws-ecs-scheduled-ecs-task-construct.md
@@ -38,11 +38,25 @@ export interface ScheduledEc2TaskProps {
   readonly cluster: ICluster;
 
   /**
-   * The CMD value to pass to the container.
+   * The image to start.
+   */
+  readonly image: ContainerImage;
+
+  /**
+   * The schedule or rate (frequency) that determines when CloudWatch Events
+   * runs the rule. For more information, see Schedule Expression Syntax for
+   * Rules in the Amazon CloudWatch User Guide.
    *
-   * If you provide a shell command as a single string, you have to quote command-line arguments.
+   * @see http://docs.aws.amazon.com/AmazonCloudWatch/latest/events/ScheduledEvents.html
+   *
+   * You must specify this property.
    */
-  readonly command?: string[];
+  readonly scheduleExpression: string;
+
+  /**
+   * The CMD value to pass to the container. A string with commands delimited by commas.
+   */
+  readonly command?: string;
 
   /**
    * The minimum number of CPU units to reserve for the container.
@@ -61,11 +75,6 @@ export interface ScheduledEc2TaskProps {
    */
   readonly environment?: { [key: string]: string };
 
-  /**
-   * The image to start.
-   */
-  readonly image: ContainerImage;
-
   /**
    * The hard limit (in MiB) of memory to present to the container.
    *
@@ -89,17 +98,6 @@ export interface ScheduledEc2TaskProps {
    * At least one of memoryLimitMiB and memoryReservationMiB is required for non-Fargate services.
    */
   readonly memoryReservationMiB?: number;
-
-  /**
-   * The schedule or rate (frequency) that determines when CloudWatch Events
-   * runs the rule. For more information, see Schedule Expression Syntax for
-   * Rules in the Amazon CloudWatch User Guide.
-   *
-   * @see http://docs.aws.amazon.com/AmazonCloudWatch/latest/events/ScheduledEvents.html
-   *
-   * You must specify this property.
-   */
-  readonly scheduleExpression?: string;
 }
 ```