Articles for exhibit at a fair shall be segregated from domestic articles and from imported articles entered under the provisions of the general Customs laws and released from Customs custody.

The Center director shall detail an officer to act as his representative at the fair and shall station inside the buildings as many additional Custom officers and employees as may be necessary to properly protect the revenue.

All actual and necessary charges for labor, services, and other expenses in connection with the entry, examination, appraisement, custody, abandonment, destruction, or release of articles entered under the regulations of this part, together with the necessary charges for salaries of Customs officers and employees in connection with the accounting for, custody of, and supervision over, such articles, shall be reimbursed by the fair operator to the Government, payment to be made to CBP, either at the port of entry or electronically, on the port director's or Center director's demand made before January 19, 2017 or on the Center director's demand made on or after January 19, 2017, for deposit to the appropriation from which paid.