the purposes of conducting research and studies and for use in accordance with the provisos under that heading for non-competitive agreements. (5) $2,000,000 shall be for grants for a radon testing and mitigation safety demonstration program (the radon demonstration) in public housing: Provided, That the testing method, mitigation method, or action level used under the radon demonstration shall be as specified by applicable State or local law, if such law is more protective of human health or the environment than the method or level specified by the Secretary: Provided further, That for purposes of environmental review, pursuant to the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq. ) and other provisions of law that further the purposes of such Act, a grant under the Healthy Homes Initiative, or the Lead Technical Studies program, or other demonstrations or programs under this heading or under prior appropriations Acts for such purposes under this heading, or under the heading Housing for the Elderly under prior Appropriations Acts, shall be considered to be funds for a special project for purposes of section 305(c) of the Multifamily Housing Property Disposition Reform Act of 1994: Provided further, That each applicant for a grant or cooperative agreement under this heading shall certify adequate capacity that is acceptable to the Secretary to carry out the proposed use of funds pursuant to a notice of funding opportunity: Provided further, That the Secretary shall conduct a demonstration to harmonize income eligibility criteria for grants under this heading in this and prior Acts with the income eligibility criteria of certain other Federal programs: Provided further, That for purposes of such demonstration, the Secretary may establish income eligibility criteria for such grants using income eligibility criteria of any program administered by the Secretary, the Department of Energy weatherization assistance program ( 42 U.S.C. 6851 et seq. ), the Department of Health and Human Services low