How are normal working conditions restored after radio silence has been imposed?

All of these answers are correct.

The Land Earth Station (LES) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI".

The Public Correspondence Station (PCS) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI".

The Rescue Coordination Center (RCC) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SEELONCE FEENEE".

How are normal working conditions restored...