At least every 4 years, the State shall submit an updated STIP concurrently to the FHWA and the FTA for joint approval. The State must also submit STIP amendments to the FHWA and the FTA for joint approval. At the time the entire proposed STIP or STIP amendments are submitted to the FHWA and the FTA for joint approval, the State shall certify that the transportation planning process is being carried out in accordance with all applicable requirements of:

23 U.S.C. 134 and 135, 49 U.S.C. 5303 and 5304, and this part;

Title VI of the Civil Rights Act of 1964, as amended (42 U.S.C. 2000d-1) and 49 CFR part 21;

49 U.S.C. 5332, prohibiting discrimination on the basis of race, color, creed, national origin, sex, or age in employment or business opportunity;

Section 1101(b) of the FAST Act (Pub. L. 114-357) and 49 CFR part 26 regarding the involvement of disadvantaged business enterprises in DOT funded projects;

23 CFR part 230, regarding implementation of an equal employment opportunity program on Federal and Federal-aid highway construction contracts;

The provisions of the Americans with Disabilities Act of 1990 (42 U.S.C. 12101 et seq.) and 49 CFR parts 27, 37, and 38;

In States containing nonattainment and maintenance areas, sections 174 and 176(c) and (d) of the Clean Air Act, as amended (42 U.S.C. 7504, 7506(c) and (d)) and 40 CFR part 93;

The Older Americans Act, as amended (42 U.S.C. 6101), prohibiting discrimination on the basis of age in programs or activities receiving Federal financial assistance;

23 U.S.C. 324, regarding the prohibition of discrimination based on gender; and

Section 504 of the Rehabilitation Act of 1973 (29 U.S.C. 794) and 49 CFR part 27 regarding discrimination against individuals with disabilities.

The FHWA and the FTA shall review the STIP or the amended STIP, and make a joint finding on the extent to which the STIP is based on a statewide transportation planning process that meets or substantially meets the requirements of 23 U.S.C. 134 and 135, 49 U.S.C. 5303 and 5304, and subparts A, B, and C of this part. Approval of the STIP by the FHWA and the FTA, in its entirety or in part, will be based upon the results of this joint finding.

If the FHWA and the FTA determine that the STIP or amended STIP is based on a statewide transportation planning process that meets or substantially meets the requirements of 23 U.S.C. 135, 49 U.S.C. 5304, and this part, the FHWA and the FTA may jointly:

Approve the entire STIP;

Approve the STIP subject to certain corrective actions by the State; or

Under special circumstances, approve a partial STIP covering only a portion of the State.

If the FHWA and the FTA jointly determine and document in the planning finding that a submitted STIP or amended STIP does not substantially meet the requirements of 23 U.S.C. 135, 49 U.S.C. 5304, and this part for any identified categories of projects, the FHWA and the FTA will not approve the STIP.

The approval period for a new or amended STIP shall not exceed 4 years. If a State demonstrates, in writing, that extenuating circumstances will delay the submittal of a new or amended STIP past its update deadline, the FHWA and the FTA will consider and take appropriate action on a request to extend the approval beyond 4 years for all or part of the STIP for a period not to exceed 180 calendar days. In these cases, priority consideration will be given to projects and strategies involving the operation and management of the multimodal transportation system. Where the request involves projects in a metropolitan planning area(s), the affected MPO(s) must concur in the request. If the delay was due to the development and approval of a metropolitan TIP(s), the affected MPO(s) must provide supporting information, in writing, for the request.

Where necessary in order to maintain or establish highway and transit operations, the FHWA and the FTA may approve operating assistance for specific projects or programs, even though the projects or programs may not be included in an approved STIP.