A proposed amendment to the Colorado Constitution seeks to prohibit gay and lesbian couples from marrying.

According to The Denver Post, if approved, the amendment would redefine the marriages of gay couples in Colorado as civil unions.

A second proposal would allow businesses in the wedding industry to hire a contractor to serve gay couples if they objected to such unions.

Both ballot questions were filed by Gene Straub and D'Arcy Straub, a lawyer.

LGBT rights advocate One Colorado criticized the initiatives.

“This initiative is an unnecessary attempt to radically redefine all marriages in Colorado in order to undermine the Supreme Court's recent decision,” One Colorado Executive Director Dave Montez said. “Even before last week's Supreme Court decision, the 37 states that already had marriage equality had proved that when loving, committed gay couples share in the freedom to marry, families are helped and no one is hurt.”

Colorado Rep. Dominick Moreno, a Democrat, called the effort moot: “You can't override the Supreme Court, especially at the state level.”

After the Supreme Court last year refused to review an appeals court's ruling striking down Utah's ban on gay marriage, Colorado, which is under the same court's jurisdiction, became the 25th state with marriage equality. Colorado lawmakers in 2013 approved civil unions.