20-1-303. Conduct of school on Saturday or Sunday prohibited -- exceptions. (1) Except as provided in subsections (2) and (3), pupil instruction may not be conducted on Saturday or Sunday.

(2) In emergencies, including during reasonable efforts of the trustees to make up aggregate hours of instruction lost during a declaration of emergency by the trustees under 20-9-806, pupil instruction may be conducted on a Saturday when it is approved by the trustees of the school district.

(3) Pupil instruction may also be held on a Saturday at the discretion of a school district for the purpose of providing additional pupil instruction beyond the minimum aggregate hours of instruction required in 20-1-301, provided that student attendance is voluntary.