Fees or charges to be made to an applicant for grading service which differ from those listed in Secs. 56.45 through 56.54 shall be provided for by a cooperative agreement. [36 FR 7894, Apr. 28, 1971. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981]