Different rules for men and women can be acceptable, however, if they do not put an unfair burden on one gender or deny employment opportunities to one gender. A policy may be discriminatory if it has a greater impact on one group of employees than another. A policy is illegal if it affects blacks more than whites, disabled more than non-disabled or Jews more than Christians. If a policy does affect one group more than another, the employer must have a business justification for the rule. Conflicts often arise when dress code policies and religious requirements clash.
Many religions require followers to dress in a certain way or wear certain items of clothing.
For example, if an employer normally requires employees to wear a t-shirt, it could accommodate the religion of a female Orthodox Jewish employee by allowing her to cover her arms. However, if wearing a particular item of clothing is required for safety reasons, an employer may require you to wear it even if doing so would discriminate against you on the basis of your religion. Work with an experienced lawyer in your state.