Regulation 77

A Singapore operator with a special operations approval to conduct any PBCS operation must, in respect of every aircraft approved for such an operation, monitor the actual performance of the aircraft against the required communications performance or required surveillance performance or both (as applicable) for the operation.

If the Singapore operator mentioned in paragraph (1) observes that an approved aircraft is not performing in accordance with the required communications performance or required surveillance performance or both (as applicable), the Singapore operator must not dispatch the affected aircraft on the approved operation until the required performance is restored.