Even though military chaplains are already allowed to opt out of marrying same-sex couples, the U.S. Senate voted Wednesday to ensure that the Defense Department never changes the rules and suddenly bars chaplains from discriminating against gay couples.
The Senate used a voice vote without any debate, according to the Army Times, to pass the Republican-authored measure as part of the annual Defense spending bill. It guarantees that any chaplain "“who as a matter of conscience or moral principle does not wish to perform a marriage, may not be required to do so.”
In the Defense Department's guidance issued in September, the religious exemption clause was already part the policy: "A chaplain is not required to participate in or officiate a private ceremony if doing so would be in variance with the tenets of his or her religion or personal beliefs."
http://www.advocate.com/News/Daily_News/2011/12/01/Senate_Shows_Its_Hand_in_Fight_Over_Gay_Marriage_on_Bases/