; and (2) the Secretary shall treat such presumption as having been rebutted upon a showing by a prospective tenant, or agent thereof, that a reasonable period of time for such updating, renovation, or refurbishment elapsed. 5. Resources for receiving and resolving complaints regarding multifamily housing projects (a) Increased HUD staffing for complaint call staffing (1) Increased staffing The Secretary shall, not later than the expiration of the 180-day period beginning on the date of the enactment of this Act, increase the staffing level for the Multifamily Housing Complaint Line established and operated by the Multifamily Housing Clearinghouse of the Department so that it is sufficient and appropriate to handle the volume of calls received without unreasonable waiting periods. (2) Authorization of appropriations For carrying out paragraph (1), there are authorized to be appropriated to the Secretary such sums as may be necessary for each fiscal year for carrying out paragraph (1). (b) Multifamily housing complaint resolution program (1) In general The Secretary shall carry out a Multifamily Housing Complaint Resolution Program for receiving complaints about multifamily housing projects from voucher users who reside in such projects and local governmental officials, under which the Secretary shall provide for— (A) gathering of information regarding each such complaint; (B) determining whether there is a likelihood that there is any violation of the requirements under the rental assistance voucher program relating to such complaint; (C) informing the owner or landlord of the complaint and any violations