The bill also prevents auto insurers from canceling coverage for violations of the seat-belt law, or because of state laws that prohibit using a cellphone or texting while driving.
In previous years, the Senate has repeatedly advanced primary-offense seat-belt legislation, but the House of Delegates rejected the bills until this year.
Opponents said the bill would infringe on people's rights. Critics also said the seat-belt law would be difficult to enforce.
Supporters said the bill would increase seat-belt use and save lives.
West Virginia will receive up to $1.5 million a year in additional federal highway safety funds because of the new law, according to the national Governor's Highway Safety Association.
The stricter seat-belt law would take effect 90 days after the governor signs the bill.
Reach Eric Eyre at erice...@wvgazette.com or 304-348-4869.