; or (B) would be locatable minerals if the legal and beneficial title to the minerals were held by the United States. 502. Enforcement (a) Orders (1) Notice of violation (A) In general If the Secretary concerned determines that any person is in violation of any surface management or operation requirement under title III or any regulation promulgated to carry out such a requirement or any permit condition required pursuant to title III, the Secretary concerned shall provide to the person a notice that describes the violation and any necessary corrective actions. (B) Abatement period (i) In general Subject to clause (ii), a person that receives notice under subparagraph (A) shall have not more than 90 days after the date of receipt of the notice to abate the violation. (ii) Extension The Secretary concerned may extend the period described in clause (i) if the person shows good cause for the extension, as determined by the Secretary concerned. (2) Cessation order (A) In general The Secretary concerned shall immediately order a cessation of mineral activities if the Secretary concerned determines that any condition or practice exists, or any person is in violation of any requirement of a permit approved, or notice of operations submitted, under this Act, that is causing, or can reasonably be expected to cause— (i) an imminent danger to the health or safety of the public; or (ii) significant, imminent harm to land, air, water, or fish or wildlife resources. (B) Requirements (i) In general A cessation order issued under subparagraph (A) shall remain in effect until the Secretary concerned— (I) determines that the condition, practice, or violation has been abated; or (II) modifies, vacates, or terminates the cessation order. (ii) Abatement In any cessation order issued under subparagraph (A), the Secretary concerned shall— (I) identify the steps necessary to abate the violation in the most expeditious manner practicable