shall not disclose any proprietary information or trade secrets provided by any individual or company for the purposes of carrying out this section or the programs and initiatives established under this section. . 303. Budget-neutral demonstration program for energy and water conservation improvements at multifamily residential units (a) Establishment The Secretary of Housing and Urban Development (referred to in this section as the Secretary ) shall establish a demonstration program under which, during the period beginning on the date of enactment of this Act, and ending on September 30, 2020, the Secretary may enter into budget-neutral, performance-based agreements that result in a reduction in energy or water costs with such entities as the Secretary determines to be appropriate under which the entities shall carry out projects for energy or water conservation improvements at not more than 20,000 residential units in multifamily buildings participating in— (1) the project-based rental assistance program under section 8 of the United States Housing Act of 1937 ( 42 U.S.C. 1437f ), other than assistance provided under section 8(o) of that Act