; and for necessary expenses of the Office of Policy Development, including services as authorized by 5 U.S.C. 3109 and 3 U.S.C. 107 , $55,000,000. Executive Residence at the White House operating expenses For necessary expenses of the Executive Residence at the White House, $12,917,000, to be expended and accounted for as provided by 3 U.S.C. 105 , 109, 110, and 112–114. reimbursable expenses For the reimbursable expenses of the Executive Residence at the White House, such sums as may be necessary: Provided , That all reimbursable operating expenses of the Executive Residence shall be made in accordance with the provisions of this paragraph: Provided further , That, notwithstanding any other provision of law, such amount for reimbursable operating expenses shall be the exclusive authority of the Executive Residence to incur obligations and to receive offsetting collections, for such expenses: Provided further , That the Executive Residence shall require each person sponsoring a reimbursable political event to pay in advance an amount equal to the estimated cost of the event, and all such advance payments shall be credited to this account and remain available until expended: Provided further , That the Executive Residence shall require the national committee of the political party of the President to maintain on deposit $25,000, to be separately accounted for and available for expenses relating to reimbursable political events sponsored by such committee during such fiscal year: Provided further , That the Executive Residence shall ensure that a written notice of any amount owed for a reimbursable operating expense under this paragraph is submitted to the person owing such amount within 60 days after such expense is incurred, and that such amount is collected within 30 days after the submission of such notice: Provided further , That the Executive Residence shall charge interest and assess penalties and other charges on any such amount that is not reimbursed within such 30 days, in accordance with the interest