2. The atheist chaplain would have to provide general religious support to those not of his faith group. IOW, he'd have to help the catholic soldier get catholic help, and the baptist soldier get baptist help, etc., etc. He would NOT be permitted to tell them to take a hike.
3. He is also required by law to conduct worship for his faith group. I don't think there is any doctrinal consensus among atheists on what that would even begin to look like. Additionally, he'd have to arrange for such worship for those not in his faith group when in a job that requires him to be with soldiers.
4. He is to provide counsel to the commander on matters of morale as touched by religion. He is to provide/arrange counseling for families, individuals, etc. He is to conduct weddings, funerals, etc. All of these things would have to be redefined.
5. Finally, he is to be a symbol of hope in darkest hours that speak of death. His symbol would be "kiss your ass goodbye, 'cause once you bite the dust here, it's all over there, too."
HOOAH!