All sub power house compounds and switchboard compounds should always locked except any work has been undergoing there. The keys of such compounds should keep under protection of sub power house attendant or switchboard attendant as per situation. He should not handover these keys to any unauthorized person without permission from concerning officer. When as per situation, sub power house attendant or switchboard attendant will hand over these keys to anyone, he should noted down this fact in his logbook and this must be signed by the person who is receiving the keys.