True or False: An assignment can only be revoked after it has been approved.

The statement that an assignment can only be revoked after it has been approved is true. This is because, typically, an assignment becomes official and binding only once it has received the necessary approvals from relevant authorities. Until that point, it may be subject to change, further review, or even cancellation. Once an assignment is approved, it becomes part of the recorded and agreed-upon obligations, and revocation can only occur under specific conditions outlined by policy or procedure.

This aligns with standard operational procedures in many contexts, where approved assignments carry a weight of commitment that unapproved ones do not have. Therefore, the statement accurately reflects the process surrounding assignments.