31 C.F.R. § 407.7 Gambling.
Title 31 - Money and Finance: Treasury
Participating in games for money or other property, the operation of gambling devices, the conduct of a lottery or pool, the selling or purchasing of numbers tickets, or any other gambling, in or on the property is prohibited.
Title 31: Money and Finance: Treasury
PART 407—REGULATIONS GOVERNING CONDUCT IN THE TREASURY BUILDING AND THE TREASURY ANNEX
§ 407.7 Gambling.