(a) In this section:
(1) “Institution of higher education” has the meaning assigned by § 61.003.
(2) “Required military service” includes required military service performed by a member of the Texas National Guard or the Texas State Guard.
(b) This section applies only if:
(1) a student enrolled in an institution of higher education fails to attend classes or engage in other required activities because the student is called to required military service that is of a reasonably brief duration, as determined by rule adopted under Subsection (d); and
(2) the student chooses not to withdraw as authorized by § 54.006(f).

(c) An institution of higher education shall excuse a student from attending classes or engaging in other required activities, including examinations, in order for the student to participate in required military service to which the student is called, including travel associated with the service. A student whose absence is excused under this subsection may not be penalized for that absence and shall be allowed to complete an assignment or take an examination from which the student is excused within a reasonable time after the absence. An instructor may appropriately respond if the student fails to satisfactorily complete the assignment or examination within a reasonable time after the absence.
(d) The Texas Higher Education Coordinating Board, in consultation with institutions of higher education, shall adopt rules as necessary to administer this section. The rules must establish a maximum period for which a student may be excused under this section. In establishing that period, the board shall consider the maximum period a student may be absent without significantly interfering with the student’s ability to learn the course material, complete course assignments, and succeed academically during the applicable semester or other academic period.