9 CFR 2.52 - How to obtain tags.
Dealers or exhibitors may obtain, at their own expense, official tags from commercial tag manufacturers. 4 At the time the dealer or exhibitor is issued a license or is registered, the Department will assign identification letters and numbers and inform them of the identification letters and numbers to be used on the official tags.
4 A list of the commercial manufacturers who produce these tags and are known to the Department may be obtained from the AC Regional Director. Any manufacturer who desires to be included in the list should notify the Administrator.