Standby and POA

Hello all, I am struggling to find some clarity on this POA issue.
We are required to be on standby for a set 8 hr shift but can be called in at anytime in the 8 hrs.
We have been told to do a manual entry as POA if not called upon.
My understanding is POA is a set length of time known in advance ? If we are called upon does this negate the POA.
Does anyone have any knowledge on this please.

stevieb200:
Hello all, I am struggling to find some clarity on this POA issue.
We are required to be on standby for a set 8 hr shift but can be called in at anytime in the 8 hrs.
We have been told to do a manual entry as POA if not called upon.
My understanding is POA is a set length of time known in advance ? If we are called upon does this negate the POA.
Does anyone have any knowledge on this please.

If during a period of POA you are called upon to work then POA stops at that point but you can go back to POA if a short job is done

Example in an 8 hour period
POA 3 hours
Work/drive 2 hours
POA 3 hours

Thanks very much Rog.
Much appreciated advice.