number of visitor-use days used, as determined under subsection (b)(2)(A) of that section during the year identified under subsection (b)(2)(B) of that section. (b) Temporary reassignment of unused Visitor-Use days The Secretary concerned may temporarily assign unused visitor-use days, made available under section 313(c)(1)(B), to— (1) any other existing or potential recreation service provider, notwithstanding the number of visitor-use days allocated to the special recreation permit holder under the special recreation permit held or to be held by the recreation service provider