If an apprentice jockey is unable to ride for a period of 5 consecutive days or more after the date of the apprentice jockey's fifth winning mount because of restriction of racing, service in National armed forces, physical disablement or illness, or enrollment and attendance in an institution of secondary or higher education, the Commission may, upon the submission of appropriate documentation, extend the time during which the apprentice weight allowance may be claimed.
7 Pa. Code § 305.277
This section cited in 7 Pa. Code § 303.32 (relating to apprentice jockeys).