Requires permission to perform the task in the occurrence's outlet; on an occurrence that is already completed or marked not applicable it requires the permission to edit completed tasks instead.

For a full explanation of task occurrences, see Recording Task Occurrences.

Completion is refused while any of the following holds:

• a value the task type asks for is still missing
• a custom field the library marks as required is not filled in
• the values make the result nok and remarks is empty
• the day has not come yet and the template has prevent_early_execution set

mitigation_skipped is only accepted when the occurrence's mitigation_policy is 1 (optional); with any other policy, skipping the corrective action is not a choice the caller has.

completion.result is recalculated from the values in force on every call, while completion.submitted_at keeps the moment the occurrence was first completed.