For purposes of section 26(a)(2)(C) of the Act, payment of a fee to the depositor of or a principal underwriter for a registered unit investment trust, or to any affiliated person or agent of such depositor or underwriter (collectively, "depositor"), for bookkeeping or other administrative services provided to the trust shall be allowed the custodian or trustee ("trustee") as an expense, provided that such fee is an amount not greater than the expenses, without profit:
17 C.F.R. §270.26a-1