“ The terms 'because of sex' or 'on the basis of sex' include, but are not limited to, because of or on the basis of pregnancy, childbirth, or related medical conditions; and women affected by pregnancy, childbirth, or related medical conditions shall be treated the same for all employment-related purposes, including receipt of benefits under fringe benefit programs, as other persons not so affected but similar in their ability or inability to work, and nothing in section 703 (h) of this title shall be interpreted to permit otherwise. ”

“ Provided, That nothing herein shall preclude an employer from providing abortion benefits or otherwise affect bargaining agreements in regard to abortion.". SEC. 2. (a) Except as provided in subsection (b) , the amendment made by this Act shall be effective on the date of enactment. (b) The provisions of the amendment made by the first section of this Act shall not apply to any fringe benefit program or fund, or insurance program which is in effect on the date of enactment of this Act until 180 days after enactment of this Act. SEC. 3. ”