(a) The commissioner by rule shall adopt an assessment instrument to be used by a school district in assessing student physical fitness under this subchapter. (b) The assessment instrument must:

• (1) be based on factors related to student health, including the following factors that have been identified as essential to overall health and function:
• (A) aerobic capacity;
• (B) body composition; and
• (C) muscular strength, endurance, and flexibility; and
• (2) include criterion-referenced Standard specific to a student’s age and gender and based on the physical fitness level required for good health.