Mortgages, as defined in section 302(d) of the Emergency Home Finance Act of 1970, which are or have been sold by the Federal Home Loan Mortgage Corporation are hereby exempted from the operation of such provisions of the Act as by their terms do not apply to an "exempted security" or to "exempted securities".
17 C.F.R. §240.3a12-1
Sec. 3(a)(12), 48 Stat. 882, 15 U.S.C. 78(c)