(1) As a minimum, a school district's requirements for graduation shall include a total of 20 units of study that enable all students to meet the content standards and content-specific grade-level or grade-band learning progressions. Students may demonstrate achievement through a flexible system of pupil-centered learning. 

(2) In order for students to graduate, they must meet the content and performance standards. The following 13 units shall be part of the 20 units.  The required units may be satisfied by an equivalent course that meets the district's curriculum and assessment requirements, which are aligned with each of the content standards:

(a) 4 units of English language arts;

(b) 2 units of mathematics;

(c) 2 units of social studies (including a 1/2 unit of Civics or Government);

(d) 2 units of science;

(e) 1 unit of health and physical education;

(f) 1 unit of arts;

(g) 1 unit of career and technical education; and

(h) 1/2 unit of economics or financial literacy within the 2 units of social studies, the 2 units of mathematics, or the 1 unit of career and technical education.

(3) Units of credit earned in any Montana high school accredited by the Board of Public Education shall be accepted by all Montana high schools.

(4) In accordance with the policies of the local board of trustees, students may be graduated from high school with less than four years enrollment.