33 CFR § 137.20 - May industry standards be used to comply with this regulation?

§ 137.20 May industry standards be used to comply with this regulation?

The industry standards in ASTM E 1527–05, (Referenced in § 137.15) may be used to comply with the requirements set forth in §§ 137.45 through 137.85 of this part. Use of ASTM E 1527–05 for this purpose is optional and not mandatory.