.12 Student eligibility requirements shall not apply to persons age 17 or under, persons age 50 or over, persons physically or mentally unfit for employment, persons attending high school, persons participating strictly in the job training portion of on-the-job-training programs as opposed to the class attendance portion, persons enrolled in an institution of higher education as specified in Section 63-406.111(a)(1) less than half-time, persons enrolled in a regular curriculum in an institution of higher education as specified in Sections 63-406.111 and 63-406.111(a)(2) less than half-time, or to persons enrolled full-time in schools and training programs which are not institutions of higher education.