31 C.F.R. § 536.318
The term finance includes engaging in any transaction involving funds, other assets, property, or interest in property, that are derived, obtained, or retained from, directly or indirectly, narcotic drugs, controlled substances, or listed chemicals. This includes the transporting, transmitting, or transferring of any such assets, property, or interests in property that creates the appearance that the funds, assets, or property were legitimately acquired, furthers the illicit activity, conceals or disguises the assets, avoids reporting requirements, or otherwise promotes the carrying on of illicit activity, such as money laundering.
Note 1 to § 536.318 : The definition of finance listed above is specific to this part and not any other parts of Chapter 31. See§ 536.101 .
31 C.F.R. §536.318