In the absence of a request under subsection (c) of this section for a new appraisal and fee determination from a cabin owner whose cabin user fee was determined as a result of an appraisal conducted after September 30, 1995, but before the date of promulgation of final regulations under section
6212 of this title, the Secretary may consider the base cabin user fee resulting from the appraisal conducted between September 30, 1995 and the date of promulgation of the final regulations under section
6212 of this title, to be the base cabin user fee that complies with this section.