Title VII of the Civil Rights Act of 1964 prohibits employers from discriminating against individuals because of their religion (or lack of religious belief) in hiring, firing, or any other terms and conditions of employment. The law also prohibits job segregation based on religion, such as assigning an employee to a non-customer contact position because of actual or feared customer preference.
In addition, the Title VII requires employers to reasonably accommodate the religious beliefs and practices of applicants and employees, unless doing so would cause more than a minimal burden on the operation of the employer's business.
A reasonable religious accommodation is any adjustment to the work environment that will allow the employee to practice his religion. Flexible scheduling, voluntary shift substitutions or swaps, job reassignments lateral transfers, and exceptions to dress or grooming rules are examples of accommodating an employee's religious beliefs.