A transaction effected by a member of a national securities exchange for the account of an associated person thereof shall be deemed to be of a kind which is consistent with the purposes of section 11(a)(1) of the Act, the protection of investors, and the maintenance of fair and orderly markets if the transaction is effected:
The member would have been permitted, under section 11(a) of the Act and the other rules thereunder, to effect the transaction: Provided, however, That a transaction may not be effected by a member for the account of and for the benefit of an associated person under section 11(a)(1)(G) of the Act and Rule 11a1-1(T) thereunder unless the associated person derived, during its preceding fiscal year, more than 50 percent of its gross revenues from one or more of the sources specified in section 11(a)(1)(G)(i) of the Act.
17 C.F.R. §240.11a1-2
Secs. 2, 3, 4, 6, 7, 11, 18, 89 Stat. 97, 104, 110, 111, 121, 155 (15 U.S.C. 78b , 78c , 78f , 78k , 78k-1 , 78o , 78w ) ; secs. 2, 3, 10, 23, 48 Stat. 881, 882, 891, 901, as amended (15 U.S.C. 78j )