17 CFR 240.12b-6: b-6 When securities are deemed to be registered.

A class of securities with respect to which a registration statement has been filed pursuant to section 12 of the act shall be deemed to be registered for the purposes of sections 13, 14, 15(d) and 16 of the act and the rules and regulations thereunder only when such statement has become effective as provided in section 12, and securities of said class shall not be subject to sections 13, 14 and 16 of the act until such statement has become effective as provided in section 12.