Michigan on Tuesday became the 24th state with a right-to-work law, which prohibits requirements that nonunion employees pay unions for negotiating contracts and other services.

Here's a list of all the states with such a law:

— Alabama
— Arizona
— Arkansas
— Florida
— Georgia
— Idaho
— Indiana
— Iowa
— Kansas
— Louisiana
— Michigan
— Mississippi
— Nebraska
— Nevada
— North Carolina
— North Dakota
— Oklahoma
— South Carolina
— South Dakota
— Tennessee
— Texas
— Utah
— Virginia
— Wyoming

Source: U.S. Department of Labor.