A federal appeals court Tuesday handed the Obama administration another victory in its effort to guarantee coverage of contraceptives under the Affordable Care Act, rejecting a challenge by the Little Sisters of the Poor, an order of Roman Catholic nuns.

he United States Court of Appeals for the 10th Circuit, in Denver, found that the nuns could opt out of a requirement to provide contraceptive coverage under an “accommodation” devised by the administration. The rule does not impose a “substantial burden” on the nuns’ free exercise of religion, the court said.