The requirements for nonattainment NSR for the ozone NAAQS are located in § 51.165 . For each nonattainment area, the state shall submit a nonattainment NSR plan or plan revision for a specific ozone NAAQS no later than 36 months after the effective date of the area's designation of nonattainment or redesignation to nonattainment for that ozone NAAQS.
40 C.F.R. §51.1314