this section— (1) Applicable employment taxes The term applicable employment taxes means the following: (A) The taxes imposed under section 3111(a) of the Internal Revenue Code of 1986. (B) So much of the taxes imposed under section 3221(a) of such Code as are attributable to the rate in effect under section 3111(a) of such Code. (2) Secretary The term Secretary means the Secretary of the Treasury or the Secretary's delegate. (3) Other terms Except as otherwise provided in this section, any term used in this section which is also used in chapter 21 or 22 of the Internal Revenue Code of 1986 shall have the same meaning as when used in such chapter. (g) Aggregation rule All persons treated as a single employer under subsection (a) or (b) of section 52 of the Internal Revenue Code of 1986, or subsection (m) or (o) of section 414 of such Code, shall be treated as one employer for purposes of this section. (h) Certain rules To apply For purposes of this section, rules similar to the rules of sections 51(i)(1) and 280C(a) of the Internal Revenue Code of 1986 shall apply. (i) Election not To have section apply This section shall not apply with respect to any eligible employer for any calendar quarter if such employer elects (at such time and in such manner as the Secretary may prescribe) not to have this section apply. (j) Third-Party payors Any credit allowed under this section shall be treated as a credit described in section 3511(d)(2) of such Code. (k) Transfers to Federal Old-Age and Survivors Insurance Trust Fund There are hereby appropriated to the Federal Old-Age and Survivors Insurance Trust Fund and the Federal Disability Insurance Trust Fund established under section 201 of the Social Security Act ( 42 U.S.C. 401 ) and the Social Security Equivalent Benefit Account established under section 15A(a) of the Railroad Retirement Act of 1974 ( 45 U.S.C. 14 231n–1(a)) amounts equal to the reduction in revenues to the Treasury by reason of this section (without regard to this subsection). Amounts appropriated by the