Idaho Code § 33-519
Upon application of his parent or guardian, or, if the student has attained the age of eighteen (18) years, upon application of the student, a student attending a public school in grades nine (9) through twelve (12) may be excused from school for a period not exceeding five (5) periods in any week or not exceeding one hundred sixty-five (165) hours per student during any one (1) school year for religious or other purposes. Release time pursuant to this section shall be scheduled by the board of trustees upon application as provided herein and the board shall have reasonable discretion over the scheduling and timing of the release time. Release time pursuant to this section shall not reduce the minimum graduation requirements for accredited Idaho high schools. The provisions of this section shall not be deemed to authorize the use of any public school facility for religious instruction. The board of trustees of a school district may not authorize the use of, and public school facilities, personnel or equipment may not be utilized, to maintain attendance records for the benefit of release time classes for religious instruction. No credit shall be awarded by the school or school district for completion of courses during release time for religious purposes. At the discretion of the board credit may be granted for other purposes.
Idaho Code § 33-519