22 Pa. Code § 31.22 – Academic year.

(a) An academic year shall consist of instructional sessions for a minimum of 28 weeks exclusive of registration, examinations and holidays.
(b) An innovative calendar arrangement of less than 28 weeks shall be permitted provided that credits and degrees awarded under the arrangement satisfy the minimum requirements as specified in § 31.21 (relating to curricula).

The provisions of this § 31.22 adopted April 30, 1982, effective May 1, 1982, 12 Pa.B. 1389.