; and (iii) in subsection (c)(1)(D) of this section, a single individual or married couple that receives benefits under the supplemental security income program under title XVI of this Act ( 42 U.S.C. 1381–1383f ) and is not an institutionalized individual or couple. (B) The Secretary shall establish rules for providing the energy refund in an equitable and administratively simple manner to households where the group of individuals who live together includes members not all of whom are described in a single clause of subparagraph (A), or includes additional members not described in any such clause. (C) The Secretary shall establish rules regarding the eligibility and delivery of the energy refund to groups of individuals described in section 3(n)(4) or (5) of the Food and Nutrition Act of 2008 ( 7 U.S.C. 2012(n) ). (4) Poverty line The term poverty line has the meaning given the term in section 673(2) of the Community Services Block Grant Act ( 42 U.S.C. 9902(2) ), including any revision required by that section. (5) State The term State means the 50 States, the District of Columbia, the Commonwealth of Puerto Rico, American Samoa, the United States Virgin Islands, Guam, and the Commonwealth of the Northern Mariana Islands. (6) State agency The term State agency means an agency of State government, including the local offices thereof, that has responsibility for administration of the 1 or more federally aided public assistance programs within the State, and in those States where such assistance programs are operated on a decentralized basis, the term shall include the counterpart local agencies administering such programs. (7) Other terms Other terms not defined in this title shall have the same meaning applied in the Supplemental Nutrition Assistance Program authorized by the Food and Nutrition Act of 2008 ( 7 U.S.C. 2011 et seq.) unless the Secretary finds for good cause that application of a particular definition would be detrimental to the purposes of the Energy Refund Program. (j) State Opt In The Secretary