(1) In general.— The amount of financial responsibility required under subsection (a) shall be based on the number of passenger accommodations as follows:
(A) $20,000 for each of the first 500 passenger accommodations.
(B) $15,000 for each additional passenger accommodation between 501 and 1,000.
(C) $10,000 for each additional passenger accommodation between 1,001 and 1,500.
(D) $5,000 for each additional passenger accommodation over 1,500.