In December 2013, the Utah's marriage equality ban was repealed by a federal court. As a result, the Attorney General Sean Reyes decided not to send the case to the Court of Appeals but send it directly to the U.S. Supreme Court.
"Attorney general Reyes has a sworn duty to defend the laws of our state," said Missy Larsen, chief communications director for Reyes' office. "Utah’s constitutional amendment three is presumed to be constitutional unless the highest court deems otherwise," said the statement.
You should know that there are about two weeks, the judges of the Tenth Circuit Court of Appeals ruled unconstitutional Utah's law that defines marriage as a union between a man and a woman.
The Attorney General was probably afraid to see his appeal dismissed by the same judges.
At the same time, it is unclear whether the Courts of Appeals will make decisions on the equal marriage or if the cases will be sent, one after the other, to the U.S. Supreme Court, which shall then decide on the federal marriage equality.
By not submitting the appeal to the Court of Appeals, the Attorney General is subject to possible refusal of the Supreme Court to hear the case.
As reports The Guardian, if the supreme court elects to hear the case, a decision on Utah's same-sex marriage ban could be issued as early as next year.