Article 210 of the UCC lists the following customs procedures under the heading of "Special Procedures":
UCC Special Procedures
Storage (customs warehousing and free zones)
Specific use (temporary admission and end-use)
Processing (inward and outward processing)
The expression "special procedures" is not explained in the UCC. However, all customs procedures listed in Article 210 of the UCC have in common that no, or only reduced, import duties are incurred.
Regular participation in a special procedure requires prior authorization from customs.