Section 15.1-21-03 - High school unit - Instructional time1. Except as provided in subsection 2, each unit must consist of at least one hundred twenty hours of student engagement per school calendar.2. The following units must consist of at least one hundred fifty hours of student engagement per school calendar: natural sciences, agriculture, business and office technology, marketing, diversified occupations, trade and industrial education, technology education, and health careers.3. The hour requirements of this section are subject to reductions resulting from the holidays and nonstudent contact days provided for in section 15.1-06-04.4. This section does not apply to schools or school districts having block schedules approved by the superintendent of public instruction.5. This section does not apply to units attained from a district-approved mastery framework under section 15.1-21-03.Amended by S.L. 2021 , ch. 136( SB 2196 ), § 5, eff. 8/1/2021.Amended by S.L. 2019 , ch. 149( SB 2265 ), § 6, eff. 7/1/2019.