California Governor Jerry Brown and Attorney General Kamala Harris have urged the California Supreme Court to deny a request to reinstate Proposition 8, California's now ended gay marriage ban.

“After years of litigation, there is now a final determination that Proposition 8 is unconstitutional,” a brief filed with the high court by lawyers for Brown and Harris reads.

“To revive Proposition 8, as petitioners have asked, by ordering county officials to enforce it would command the violation of gay and lesbian Californians' federal constitutional rights.”

Protect Marriage, the group that sponsored the 2008 constitutional amendment which defined marriage as a heterosexual union, on Friday asked the state's highest court to reinstate the ban, arguing that Brown did not have the authority to end enforcement of Proposition 8.

Proposition 8 tumbled after the Supreme Court ruled that interveners lacked standing to defend the law, leaving in place a 2010 circuit court ruling declaring it unconstitutional.

Within days after the Supreme Court ruled, the Ninth Circuit Court of Appeals lifted its stay in the ruling, allowing same-sex marriages to resume in California.

However, Protect Marriage argues that a provision in the California Constitution prohibits state officials from refusing to enforce a law unless it has been deemed unconstitutional by an appellate court.

Protect Marriage also argues that the 2010 ruling only applies to the two counties where plaintiffs live, not the entire state.

On June 28, Brown ordered clerks in all 58 counties to resume issuing marriage license to gay couples.

(Related: Dennis Herrera calls attempt to reinstate Prop 8 “desperate.”)