33 C.F.R. § 107.230
(a) Unauthorized departure or entry, or both.
(b) Knowing failure to comply. Any person to whom this subpart applies as described in §§ 107.210(a)(2) or (a)(3) who knowingly fails to comply with this subpart or order given under this subpart, or knowingly obstructs or interferes with the exercise of any power conferred by this subpart may be subject to: