practice, or violation: (A) An imminent danger to the health or safety of the public. (B) Significant, imminent environmental harm to land, air, water, or fish or wildlife resources. (3) Duration (A) Termination A cessation order pursuant to paragraph (1) or (2) xreference shall remain in effect until such Secretary, or authorized representative, determines that the condition, practice, or violation has been abated, or until modified, vacated or terminated by the Secretary or authorized representative. In any such order, the Secretary or authorized representative shall determine the steps necessary to abate the violation in the most expeditious manner possible and shall include the necessary measures in the order. (B) Financial assurances The Secretary concerned shall require appropriate financial assurances to ensure that the abatement obligations are met when issuing an order under this section. (C) Authority of the Secretary Any notice or order issued pursuant to paragraph (1) or (2) may be modified, vacated, or terminated by the Secretary concerned or an authorized representative of such Secretary. Any person to whom any such notice or order is issued shall be entitled to a hearing on the record. (4) Alternative enforcement action If, after 30 days of the date of the order referred to in subsection (a) the required abatement has not occurred, the Secretary concerned shall take such alternative enforcement action against the claim holder, license holder, lease holder, or operator (or any person who controls the claim holder, license holder, lease holder, or operator) as will most likely bring about abatement in the most expeditious manner possible. Such alternative enforcement action may include seeking appropriate injunctive relief to bring about abatement. Nothing in this paragraph shall preclude the Secretary concerned from taking alternative enforcement action prior to the expiration of 30 days. (5) Failure or default If a claim holder, license holder, lease holder, or operator (or any person who controls