(a) The State's Highway Safety Plan for a fiscal year and the State's authority to incur costs under that Highway Safety Plan shall expire on the last day of the fiscal year.

(b) Except as provided in paragraph (c) of this section, each State shall submit a final voucher which satisfies the requirements of §1200.33 within 90 days after the expiration of the State's Highway Safety Plan as provided in paragraph (a) of this section. The final voucher constitutes the final financial reconciliation for each fiscal year.

(c) The Approving Official may extend the time period to submit a final voucher only in extraordinary circumstances. States shall submit a written request for an extension describing the extraordinary circumstances that necessitate an extension. The approval of any such request for extension shall be in writing, shall specify the new deadline for submitting the final voucher, and shall be signed by the Approving Official.