31 C.F.R. § 500.502 Effect of subsequent license or authorization.
Title 31 - Money and Finance: Treasury
No license or other authorization contained in this chapter or otherwise issued by or under the direction of the Secretary of the Treasury pursuant to section 3(a) or 5(b) of the Trading With the Enemy Act, as amended, shall be deemed to authorize or validate any transaction effected prior to the issuance thereof, unless such license or other authorization specifically so provides.
Title 31: Money and Finance: Treasury
PART 500—FOREIGN ASSETS CONTROL REGULATIONS
Subpart E—Licenses, Authorizations and Statements of Licensing Policy
§ 500.502 Effect of subsequent license or authorization.

