; and (C) the date on which the individual tests negative for each such controlled substance, in such manner and at such times as the applicable administrative entity determines to be appropriate. (3) Responsibility for testing and screening (A) Manner and time An applicable administrative entity may provide for testing and screening pursuant to paragraph (1), and retesting and rescreening pursuant to paragraph (2), in such manner and at such times as the entity determines to be appropriate. (B) Costs An applicable administrative entity may not require an individual or family to pay the cost of a test or screening conducted pursuant to this subsection. (4) Proration of financial assistance If an individual for whose benefit covered housing assistance is prohibited pursuant to this subsection is a member of family that includes at least one other member whose eligibility under this subsection for such assistance has been affirmatively established pursuant to testing under this subsection, covered housing assistance made available to such family shall be prorated, based on the number of individuals in the family for whom eligibility under this subsection for such assistance has been affirmatively established pursuant to testing under this subsection as compared with the total number of individuals who are members of the family. (5) Failure to enforce drug testing requirement If the Secretary of Housing and Urban Development determines that a public housing agency has substantially failed to comply with this subsection during a fiscal year, the Secretary shall reduce by 15 percent the amount otherwise provided to the agency, for the immediately succeeding fiscal year, under each of the following programs: (A) The public housing Capital Fund program under section 9(d) of the United States Housing Act of 1937 ( 42 U.S.C. 1437g(d) ). (B) The public housing Operating Fund program under section 9(e) of the United States Housing Act of 1937 ( 42 U.S.C. 1437g(e) ). (C) All programs for rental housing assistance under