Final answer:
The question relates to the protocol for personnel to follow when returning from sick leave and the timing necessary to call if they require a relief worker. Specific call-in details are missing but the guideline is related to law enforcement or similar procedural-driven entities.
Step-by-step explanation:
The question pertains to a procedure that must be followed by personnel within a specific organization, likely in the context of law enforcement or a similar entity where protocol is critical. While the specific entities (such as the '_______' where members must call) are blanked out, generally, members returning from sick leave should call a designated phone number or contact person in their assigned district. The message likely includes information about their status and availability for duty. Furthermore, personnel who anticipate the need for a relief worker due to their absence should call before a certain time to ensure proper staffing and coverage. This timeframe ensures that there is sufficient notice for a relief to be arranged.