; and (B) the term son or daughter (as used in such section) includes a son or daughter (as defined in section 101 of such Act) of the individual’s domestic partner. (2) Domestic partner (A) In general For purposes of paragraph (1), the term domestic partner , with respect to an individual, means another individual with whom the individual is in a committed relationship. (B) Committed relationship defined The term committed relationship means a relationship between two individuals (each at least 18 years of age) in which each individual is the other individual’s sole domestic partner and both individuals share responsibility for a significant measure of each other’s common welfare. The term includes any such relationship between two individuals, including individuals of the same sex, that is granted legal recognition by a State or political subdivision of a State as a marriage or analogous relationship, including a civil union or domestic partnership. (k) Applicability of certain Social Security Act provisions The provisions of sections 204, 205, 206, and 208 of the Social Security Act shall apply to benefit payments authorized by and paid out pursuant to this section in the same way that such provisions apply to benefit payments authorized by and paid out pursuant to title II of such Act. (l) Effective date for applications Applications described in this section may be filed beginning 18 months after the date of enactment of this Act. 6. Establishment of Family and Medical Leave Insurance Trust Fund (a) In general There is hereby created on the books of the Treasury of the United States a trust fund to be known as the Federal Family and Medical Leave Insurance Trust Fund . The Federal Family and Medical Leave Insurance Trust Fund shall consist of such gifts and bequests as may be made as provided in section 201(i)(1) of the Social Security Act ( 42 U.S.C. 401(i)(1) ) and such amounts as may be appropriated to, or deposited in, the Federal Family and Medical Leave Insurance Trust Fund as provided in this section.