16 U.S. Code § 4305 - Collection and removal from Federal caves
Any permit issued under this section shall be revoked by the Secretary upon a determination by the Secretary that the permittee has violated any provision of this chapter, or has failed to comply with any other condition upon which the permit was issued. Any such permit shall be revoked by the Secretary upon assessment of a civil penalty against the permittee pursuant to section 4307 of this title or upon the permittee’s conviction under section 4306 of this title. The Secretary may refuse to issue a permit under this section to any person who has violated any provision of this chapter or who has failed to comply with any condition of a prior permit.
No action specifically authorized by a permit under this section shall be treated as a violation of section 4306 of this title.