The commissioner is authorized to adopt and enforce such registration rules and regulations as may be deemed necessary and compatible with the public interest with respect to the change or substitution of one engine in place of another in any motor vehicle.
W. Va. Code § 17A-3-21
Regulations governing change of motors
Official source: West Virginia Legislature. Reproduced from public-domain West Virginia statutes; confirm against the official source for the current text. Not legal advice.