Architectural units—such as split-face, ground-face, or glazed block—undergo additional surface processing that differentiates them from plain gray block. For customs and procurement purposes, the surface finish, dimensional precision, and intended aesthetic application are the key distinguishing factors, and these attributes should be documented in commercial invoices and product specifications.

Importers should verify current antidumping and countervailing duty orders with US Customs and Border Protection, as trade-remedy coverage can change. Consulting a licensed customs broker before importing is advisable to confirm whether any orders are in effect for the specific origin country and product type.