The old rule was 2 years adopted in 1989 and revised in 1990.
15.5.6.3.6 Aid First Awarded After Second Year. [FBS/FCS] A student-athlete who has been in residence at the certifying institution for at least two academic years may receive athletically related financial aid for the first time without such aid counting as an initial award, provided the aid falls within the overall grant limitation. (Adopted: 1/11/89, Revised: 1/10/90 effective 8/1/90)
It was revised again in 2018 and changed to 1 year.
15.5.6.3.5 Aid First Awarded After First Year. [FBS/FCS] A student-athlete who has been in residence at the certifying institution for at least one academic year may receive athletically related financial aid for the first time without such aid counting as an initial award, provided the aid falls within the overall grant limitation. (Adopted: 1/11/89, Revised: 1/10/90 effective 8/1/90, 4/25/18 effective 8/1/18)
15.5.6.3.6 Aid First Awarded After Second Year. [FBS/FCS] A student-athlete who has been in residence at the certifying institution for at least two academic years may receive athletically related financial aid for the first time without such aid counting as an initial award, provided the aid falls within the overall grant limitation. (Adopted: 1/11/89, Revised: 1/10/90 effective 8/1/90)
It was revised again in 2018 and changed to 1 year.
15.5.6.3.5 Aid First Awarded After First Year. [FBS/FCS] A student-athlete who has been in residence at the certifying institution for at least one academic year may receive athletically related financial aid for the first time without such aid counting as an initial award, provided the aid falls within the overall grant limitation. (Adopted: 1/11/89, Revised: 1/10/90 effective 8/1/90, 4/25/18 effective 8/1/18)