(a) United States persons are authorized to engage in all financial transactions with a Terrorism List Government that is not otherwise subject to 31 CFR chapter V, except for a transfer from a Terrorism List Government:
(1) Constituting a donation to a United States person; or
(2) With respect to which the United States person knows (including knowledge based on advice from an agent of the United States Government), or has reasonable cause to believe, that the transfer poses a risk of furthering terrorist acts in the United States.
(b) Nothing in this section authorizes the return of a transfer prohibited by paragraph (a)(2) of this section.