The latest edict from beard-obsessed Secretary of War Pete Hegseth adds strict new regulations to his crusade on facial hair, which rights groups have characterized as an attack on troops’ civil liberties.

In a March 11 memo, Hegseth, who has made grooming and appearances a central focus in his time at the helm of the U.S. military, raised the bar to qualify for a religious exemption to his blanket ban on beards. The guidelines lay out a strict new process by which service members may apply for a religious exemption and subject those who’ve already received one to a reevaluation, arguing they need to ensure their religious beliefs are “sincerely held” and have a genuine conflict with the grooming standards.

Service members who have spoken against Hegseth’s focus on grooming standards say his restrictions on beards are exclusionary to people from religious communities that require adherents to follow specific tenets of faith around beards, hair, and other grooming matters.

Sikhs, for example, who have served in the U.S. military since at least World War I, are required by their faith not to cut the hair on their head, to keep a beard, and to wrap their long hair in a turban. Members of many schools of Muslim tradition likewise have rules around beards and hair length.