Schools are required to allow students to be released for religious programs. This does not mean schools do not have the ability to create policies that protect the school's instruction time.
Read more about "May" and "Shall" state laws

Full Law Text Link to State Law

15.1-19-04. Religious instruction - Excuse of student.
At the request of a student's parent or guardian, the student's school principal shall permit a
student to be excused for up to one hour each week in order to obtain religious instruction.

Notes

(NONE)