34 C.F.R. § 200.17
Each State must establish intermediate goals that increase in equal increments over the period covered by the timeline under § 200.15 as follows:
(b) Each following incremental increase must occur in not more than three years.
(Authority: 20 U.S.C. 6311(b)(2))
[82 FR 31692, July 7, 2017]