RULE. Generally, DoD personnel (including their families) may not directly or indirectly accept or solicit for gifts given: (1) Because of their official position; or (2) Offered by a “prohibited source.”
gifts to service members and their families - DoD Ethics
dodsoco.ogc.osd.mil > Portals > gifts_to_servicemembers
Regardless of the source, an employee normally may accept items of nominal value and light refreshments, such as a greeting card, a cup of coffee, a cookie, and the like. The rules also permit an employee to accept a gift, other than cash, from a coworker worth up to $10.
A Holiday Reminder about the Gift Rules - Office of Government Ethics
oge.gov > web > oge.nsf > Resources > A+Holiday+Reminder+about+the+...
You may not accept this gift. The gift is from a prohibited source and is being offered because of your official position. You may not offer to pay the additional $5 (the $20 rule is NOT a "Federal $20 discount").
GIFTS | U.S. Department of the Interior
www.doi.gov > ethics > gifts
As a general rule, a DoD employee cannot accept an item from an outside source unless the item is excluded from the definition of a gift, or the items falls under a specific regulatory exception for gifts.
Gifts: Ethical rules for DoD employees | Article - Army.mil
www.army.mil > article > gifts_ethical_rules_for_dod_employees