Does DOT certify multi-stage vehicle manufacturers?

This article addresses a common question from NTEA members about whether multi-stage vehicle manufacturers are certified by the U.S. Department of Transportation (DOT). It outlines how federal regulations define vehicle manufacturers, explains the roles of incomplete, intermediate, final-stage, and altered-stage manufacturers, and explores how identification and compliance requirements are handled in the U.S. and Canada. The discussion provides regulatory context and points readers to additional resources for understanding manufacturer responsibilities and vehicle certification obligations.