; or (2) any existing or potential holder of a special recreation permit described in clause (i) or (iii) of paragraph (13)(A) of section 802 of the Federal Lands Recreation Enhancement Act ( 16 U.S.C. 6801 ) (as amended by this title), including the public. (c) Additional capacity If unallocated visitor-use days are available, the Secretary concerned may, at any time, amend a special recreation permit to allocate additional visitor-use days to a qualified recreation service provider. 319. Liability (a) Insurance requirements (1) In general Except as provided in paragraph (2), as a condition of issuing a special recreation permit under subsection (h)(1)(B) of section 803 of the Federal Lands Recreation Enhancement Act ( 16 U.S.C. 6802 ) (as amended by this title) or a commercial use authorization, the Secretary concerned may require the holder of the special recreation permit or commercial use authorization to have a commercial general liability insurance policy that— (A) is commensurate with the level of risk of the activities to be conducted under the special recreation permit or commercial use authorization