For purposes of this part:

(1) The term “active uranium or thorium processing site” means—

(A) any uranium or thorium processing site, including the mill, containing byproduct material for which a license (issued by the Nuclear Regulatory Commission or its predecessor agency under the Atomic Energy Act of 1954 [42 U.S.C. 2011 et seq.], or by a State as permitted under section 274 of such Act (42 U.S.C. 2021)) for the production at such site of any uranium or thorium derived from ore—

(i) was in effect on January 1, 1978;

(ii) was issued or renewed after January 1, 1978; or

(iii) for which an application for renewal or issuance was pending on, or after January 1, 1978; and

(B) any other real property or improvement on such real property that is determined by the Secretary or by a State as permitted under section 274 of the Atomic Energy Act of 1954 (42 U.S.C. 2021) to be—

(i) in the vicinity of such site; and

(ii) contaminated with residual byproduct material;

(2) The term “byproduct material” has the meaning given such term in section 11 e. (2) of the Atomic Energy Act of 1954,1 (42 U.S.C. 2014(e)(2)); and

(3) The term “decontamination, decommissioning, reclamation, and other remedial action” means work performed prior to or subsequent to October 24, 1992, which is necessary to comply with all applicable requirements of the Uranium Mill Tailings Radiation Control Act of 1978 (42 U.S.C. 7901 et seq.), or where appropriate, with requirements established by a State that is a party to a discontinuance agreement under section 274 of the Atomic Energy Act of 1954 (42 U.S.C. 2021).