U.S. Equal Employment Opportunity Commission
Title VII of the Civil Rights Act of l964 prohibits employers from discriminating against individuals because of their religion in hiring, firing, and other terms and conditions of employment. The Act also requires employers to reasonably accommodate the religious practices of an employee or prospective employee, unless to do so would create an undue hardship upon the employer (see also 29 CFR l605). A reasonable religious accommodation is any adjustment to the work environment that will allow the employee to practice his religion. Flexible scheduling, voluntary substitutions or swaps, job reassignments and lateral transfers are examples of accommodating an employee's religious beliefs.
Employers generally should not schedule examinations or other selection activities in conflict with a current or prospective employee's religious needs, inquire about an applicant's future availability at certain times, maintain a restrictive dress code, or refuse to allow observance of a Sabbath or religious holiday, unless the employer can show that not doing so would cause an undue hardship.
An employer can claim undue hardship when asked to accommodate an applicant’s or employee's religious practices if allowing such practices requires more than ordinary administrative costs, diminishes efficiency in other jobs, infringes on other employees' job rights or benefits, impairs workplace safety, causes co-workers to carry the accommodated employee's share of potentially hazardous or burdensome work, or if the proposed accommodation conflicts with another law or regulation. Undue hardship also may be shown if the request for an accommodation violates the terms of a collective bargaining agreement or job rights established through a seniority system.
An employee whose religious practices prohibit payment of union dues to a labor organization cannot be required to pay the dues, but may pay an equal sum to a charitable organization.
It is also unlawful to retaliate against an individual for opposing employment practices that discriminate based on religion or for filing a discrimination charge, testifying, or participating in any way in an investigation, proceeding, or litigation under Title VII.