36 CFR §71.9

1. (a)Recreation use fees shall be established by all outdoor recreation administering agencies of the Department of the Interior in accordance with the following criteria:
   1. (1)The direct and indirect cost to the government,
   2. (2)The benefit to the recipient,
   3. (3)The public policy or interest served,
   4. (4)The comparable recreation fees charged by other Federal agencies, non-Federal public agencies and the private sector located within the service area of the management unit at which the fee is charged,
   5. (5)The economic and administrative feasibility of fee collection, and
   6. (6)Other pertinent factors.
2. (b)With the approval of the Secretary of the Interior recreation use fees may be established for other types of facilities in addition to those which are listed below.
3. (c)Types of recreation facilities for which use fees may be charged: