17 C.F.R. § 270.22d-1
A registered investment company that is the issuer of redeemable securities, a principal underwriter of such securities or a dealer therein shall be exempt from the provisions of section 22(d) to the extent necessary to permit the sale of such securities at prices that reflect scheduled variations in, or elimination of, the sales load. These price schedules may offer such variations in or elimination of the sales load to particular classes of investors or transactions, Provided, That:
(d) The company advises existing shareholders of any new sales load variation within one year of the date when that variation is first made available to purchasers of the company's shares.
(Secs. 6(c) (15 U.S.C. 80a-6(c)) and 38(a) (15 U.S.C. 80a-37(a)))
[50 FR 7911, Feb. 27, 1985]