30 U.S.C. § 1424

Each license and permit issued under this subchapter shall require the licensee or permittee— (1) to allow the Administrator to place appropriate Federal officers or employees as observers aboard vessels used by the licensee or permittee in exploration or commercial recovery activities (A) to monitor such activities at such time, and to such extent, as the Administrator deems reasonable and necessary to assess the effectiveness of the terms, conditions, and restrictions of the license or permit, and (B) to report to the Administrator whenever such officers or employees have reason to believe there is a failure to comply with such terms, conditions, and restrictions; (2) to cooperate with such officers and employees in the performance of monitoring functions; and (3) to monitor the environmental effects of the exploration and commercial recovery activities in accordance with guidelines issued by the Administrator and to submit such information as the Administrator finds to be necessary and appropriate to assess environmental impacts and to develop and evaluate possible methods of mitigating adverse environmental effects.