On what basis or standards a Primary substation building can be legally waved off from local civil defense scrutiny /review and approval?

As project departments are constructing and energizing the primary substation ,as a common legal approach substation building needs to be approved by local civil defense department as its situated inside city , which is100% unmanned on designated maintenance staff goes there periodically with maximum care and minimum exposure to any hazard.even though local civil defense will ask many requirements which may be applicable for public or pvt occupancy usage building and that increases unnecessary cost and maintenance