A Colorado judge on Thursday ruled that the Boulder County clerk and recorder can continue issuing marriage licenses to gay and lesbian couples.

However, District Court Judge Andrew Harman said the validity of the licenses remains in question.

Boulder County Clerk Hillary Hall began issuing the licenses after the Tenth Circuit Court of Appeals in Denver upheld a lower court's ruling striking down Utah's constitutional amendment limiting marriage to heterosexual unions. On Wednesday, Utah officials announced they would appeal the case to the Supreme Court.

The Tenth Circuit's jurisdiction includes Colorado, and Hall cited the ruling in explaining her actions.

Colorado Attorney General John Suthers warned Hall she was violating the law and sued her after she refused to stop issuing the licenses.

In issuing his 23-page ruling, Harman noted that Colorado's ban was declared invalid in a separate ruling handed down on Wednesday.

(Related: Judge declares Colorado's gay marriage ban unconstitutional.)

“As evidence of the ever shifting sands, on July 9, 2014, the same day as the hearing on this case, the District Court for Adams County, Colorado ruled that Colorado's laws banning same-sex marriage are unconstitutional, striking down the foundation for plaintiff's action in the case at bar,” Harman wrote.

While Harman refused to order Hall to stop, he instructed her to notify all license recipients “that the validity of their marriages is dependent upon whether a court would find that Clerk Hall had authority to allow same-sex marriages.”