(a) Except for rupture discs, each pressure relieving device in a compressor station must be inspected and tested in accordance with sections 255.739 and 255.743 of this Part, and must be operated periodically to determine that it opens at the correct set pressure.

(b) Any defective or inadequate equipment found must be promptly repaired or replaced.

(c) Each remote control shutdown device must be inspected and tested at intervals not exceeding 15 months, but at least once each calendar year, to determine that it functions properly.