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This guide cuts through the overlap. For each major vehicle category, we explain which federal regulations apply, what those regulations specifically require for wheelchair securement, and where industry standards like WC18 fit into the picture. Whether you're outfitting a single conversion van or managing a multi-vehicle NEMT fleet, knowing the rules for your vehicle type is the foundation of a defensible compliance program.

If you work in NEMT, paratransit, or school bus transportation, you've almost certainly encountered the term WC18. But there's a second standard — WC19 — that gets far less attention despite being equally important to safe wheelchair transport. The confusion between the two is common, and understandable: the names are similar, both come from RESNA, and both deal with wheelchair safety in vehicles.

WC18 — developed by the Rehabilitation Engineering and Assistive Technology Society of North America (RESNA) — represents a fundamental shift. Published as an ANSI standard, WC18 addresses the key limitations of its predecessors and sets a significantly higher bar for crash protection.