The First Circuit Court of Appeals on Wednesday ruled against 13 Puerto Rico lawmakers who wish to intervene in a case challenging the territory's ban on gay marriage.

Eight senators and five representatives filed the motion after Governor Alejandro Garcia Padilla, a Democrat who says he's personally opposed to marriage equality, announced that his administration would no longer defend the ban in court.

“The motion for leave to intervene filed by eight named Senators and five named Representatives of the Puerto Rico Legislature is denied,” the court wrote. “The movants have failed to cite any authority in support of their suggestion that, as individual legislators, they have a 'direct and significantly protectable' interest.”

Last year, a federal judge upheld Puerto Rico's ban, saying that allowing such unions could lead to plural and incestuous marriages. Plaintiffs in the case, three couples who want Puerto Rico to recognize their marriages and two couples who wish to marry in the territory, appealed the decision to the First Circuit, which includes under its jurisdiction five states where gay couples can marry, plus Puerto Rico.

The First Circuit added that it was “ably served by the existing briefs of the parties as well as the numerous amicus briefs submitted” and that “allowing intervention at this stage may impede the court's ability to dispose of the matter promptly” if it chooses to do so after the Supreme Court rules in a similar case challenging bans in four states.

Earlier this month, Guam became the first U.S. territory with marriage equality.

(Document provided by Equality Case Files.)