For the purposes of section 11 of the Securities Act of 1933, as amended [
15 U.S.C.
77k] the effective date of the latest amendment filed shall be deemed the effective date of the registration statement with respect to securities sold after such amendment shall have become effective. For the purposes of section 13 of the Securities Act of 1933, as amended [
15 U.S.C.
77m], no such security shall be deemed to have been bona fide offered to the public prior to the effective date of the latest amendment filed pursuant to this subsection. Except to the extent the Commission otherwise provides by rules or regulations as appropriate in the public interest or for the protection of investors, no prospectus relating to a security issued by a face-amount certificate company or a redeemable security issued by an open-end management company or unit investment trust which varies for the purposes of subsection (a)(3) of section
10 of the Securities Act of 1933 [
15 U.S.C.
77j
(a)(3)] from the latest prospectus filed as a part of the registration statement shall be deemed to meet the requirements of said section
10 [
15 U.S.C.
77j] unless filed as part of an amendment to the registration statement under said Act [
15 U.S.C.
77a et seq.] and such amendment has become effective.