5 C.F.R. § 3601.103
In addition to the gifts which come within the exceptions set forth in 5 CFR 2635.204, and subject to all provisions of 5 CFR 2635.201 through 2635.205, a DoD employee may accept gifts from outside sources otherwise prohibited by 5 CFR 2635.202(a) as follows:
(a) Events sponsored by States, local governments or civic organizations. A DoD employee may accept a sponsor's unsolicited gift of free attendance for himself and an accompanying spouse at an event sponsored by a State or local government or by a civic organization exempt from taxation under 26 U.S.C. 501(c)(4) when:
(b) Scholarships and grants. A DoD employee, or the dependent of a DoD employee, may accept an educational scholarship or grant from an entity that does not have interests that may be substantially affected by the performance or non-performance of the involved DoD employee's official duties, or from an association or similar entity that does not have a majority of members with such interests, if the designated agency ethics official or designee determines that: