Except as provided in this chapter, the Secretary of the Treasury shall deposit in the Treasury as miscellaneous receipts amounts the Secretary receives from the operations of the United States Mint. Expenditures made from appropriated funds which are subsequently determined to be properly chargeable to the Numismatic Public Enterprise Fund established by section 5134 shall be reimbursed by such Fund to the appropriation. The Secretary shall annually sell to the public, directly and by mail, sets of uncirculated and proof coins minted under paragraphs (1) through (6) of section 5112(a) of this title, and shall solicit such sales through the use of the customer list of the United States Mint. Except with respect to amounts deposited in the Numismatic Public Enterprise Fund in accordance with section 5134, the Secretary may not use amounts the Secretary receives from profits on minting coins or from charges on gold or silver bullion under section 5122 to pay officers and employees.