33 CFR § 140.3 - Applicability.
Unless otherwise stated, this subchapter applies to OCS facilities, vessels, and other units engaged in OCS activities as the term “OCS activities” is defined in § 140.10. This subchapter does not apply to pipelines and deepwater ports (as the term “deepwater port” is defined in section 3(10) of the Deepwater Port Act of 1974 (33 U.S.C. 1502)). The regulations in this subchapter (parts 140 through 147) have preemptive effect over state or local regulations in the same field.