In an abandoned warehouse in Springfield Monday morning, Gov. Eric Greitens signed legislation making Missouri the country’s 28th right-to-work state.

Before the day is done, he’ll sign the measure two more times.

Greitens’ signature puts the finishing touches on decades of work by Republicans and business groups to enact a right-to-work law in Missouri, which allows employees in unionized workplaces to opt out of paying unions for the cost of being represented.