It's an early skirmish in a year expected to be full of battles over the so-called contraceptive mandate in the Obamacare law.
The administration says the group is already exempt from the law, because their insurance is provided by Christian Brothers Services. As a church organization, it's excused from the law's requirements. The nuns have said they don't want to sign a waiver asking for an exemption.
"They need only self-certify that they are non-profit organizations that hold themselves out as religious and have religious objections to providing coverage for contraceptive services," the Department of Justice wrote in its response.
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