If an employee who is entitled to overtime pay elects to perform compensatory work under this section: for any workweek in which the employee works 40 hours or less, each hour of compensatory work offsets 1 hour of absence for religious observance; and for any workweek in which the employee works more than 40 hours, each hour of compensatory work over 40 hours offsets 1.5 hours of absence for religious observance. If an employee who is exempt from overtime pay elects to perform compensatory work under this section, each hour of compensatory work offsets 1 hour of absence for religious observance.