My son is in Administrative Seg--he sees NO ONE but us for 2 weeks on Saturday.  They told him he had to remain clean shaven when 6 days a week he may not even have a human conversation outside of direct orders.  He asked why he had to stay clean shaven.  They said for religious reasons they can have a beard and mustache.  Truthfully, he said he finally felt like he had some control over any single thing in his lie.  HOWEVER, they said it was for religious reasons and only allowed to shave on his  birthday once a year.  That bit him in the butt!