19 CFR 147.42: Disposition generally.

(a) Kinds of disposition. Any article entered for a fair under this part may be entered for consumption, for warehouse, or under any other provision of the Customs laws, or for another fair, or may be transferred to other Customs custody status or to a foreign-trade zone, or abandoned to the Government, or destroyed under Customs supervision, or exported, at any time before, or within 3 months after, the closing date of the fair.

(b) Appraisement. Upon entry under any provision of the Customs laws, or at the expiration of 3 months after the closing date of the fair in the case of articles not previously entered or transferred, articles entered for fairs shall be appraised.

(c) Period for performance of certain acts. In the case of any article entered under a provision of the Customs laws, or for another fair, or transferred to other Customs custody status, or to a foreign-trade zone, the period prescribed for the performance of any act required by the provision governing the status under which the article is entered, or to which it is transferred, shall be computed from the date of such entry or transfer.