Unless the Commandant directs otherwise, an independent laboratory accepted by the Coast Guard under 46 CFR part 159, subpart 159.010, must perform or witness, as appropriate, inspections, tests, and oversight required by ISO 18813:2006(E) paragraph 4.31 (incorporated by reference, see § 160.046-3). Approval and production tests of emergency provisions must be carried out in accordance with the procedures for independent laboratory inspections in 46 CFR part 159, subpart 159.007, and in this section unless the Commandant authorizes alternative tests and inspections. The Commandant may prescribe additional production tests and inspections necessary to maintain quality control and to monitor compliance with the requirements of this subpart.