5 CFR § 735.201 - What are the restrictions on gambling?
(a) While on Government-owned or leased property or on duty for the Government, an employee shall not conduct or participate in any gambling activity, including operating a gambling device, conducting a lottery or pool, participating in 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
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