5 C.F.R. § 735.201 Gambling.
Title 5 - Administrative Personnel
(a) While on Government-owned or leased property or while on duty for the Government, an employee shall not conduct, or participate in, any gambling activity including the operation of a gambling device, conducting a lottery or pool, a game for money or property, or selling or purchasing a numbers slip or ticket. (b) This section does not preclude activities: (1) Necessitated by an employee's official duties; or (2) Under section 7 of Executive Order 12353 and similar agency-approved activities.
Title 5: Administrative Personnel
PART 735—EMPLOYEE RESPONSIBILITIES AND CONDUCT
Subpart B—Standards of Conduct
§ 735.201 Gambling.