These organisations, in a letter to the Department of Defense, have asked the Pentagon to consider fine-tuning its revised instruction to better accommodate religious practices.
The new guidelines require service members to violate their religion while accommodation requests are pending and they are made to repeatedly apply for temporary waivers, the letter which was also signed by the Sikh Coalition said.
The letter states that these "stifling" requirements "may needlessly limit career opportunities - or, in some cases, end careers."
Since the Pentagon began restricting the ability of Sikhs to serve in the US Armed Forces in 1981, only three Sikhs - Major Kamaljeet Singh Kalsi, Captain Tejdeep Singh Rattan and Cpl Simran Preet Singh Lamba - have received permission to serve in the US Army while maintaining their articles of faith.
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Despite their achievements, including promotions, awards, and two successful deployments to Afghanistan, their religious accommodations are neither permanent nor guaranteed under the new guidelines, must be constantly renewed and can be taken away at any time even shortly before retirement.
"This is so, even if they are otherwise qualified to serve and an accommodation is unlikely to undermine safety or other necessary objectives. We urge you to reconsider this provision, which has the effect of forcing some religion observing service members to make an impossible choice between their faith and their chosen profession," the letter said.
The signatories to the letter include Muslim Advocates, National Council of Jewish Women, Sikh American Legal Defense and Education Fund (SALDEF), United Methodist Church, General Board of Church and Society.