42 C.F.R. § 431.412
(a) Initial demonstration application content.
(1) Applications for initial approval of a demonstration will not be considered complete unless they comply with the public notice process set forth in § 431.408(a) of this subpart, and include the following:
(b) Demonstration application procedures. A State application for approval of a new demonstration project or an extension of an existing demonstration project must be submitted to CMS as both printed and electronic documents. Electronic documents must be submitted in a format that will be accessible to individuals with disabilities.
(1) Consistent with § 431.416(a) of this subpart, within 15 days of receipt of a complete application, CMS will send the State a written notice informing the State of receipt of the submitted application, the date in which the Secretary received the State's demonstration application and the start date of the 30-day Federal public notice process set forth in § 431.416 of this subpart. The written notice—
(c) Demonstration extension request. A request to extend an existing demonstration under sections 1115(a), (e), and (f) of the Act will be considered only if it is submitted at least 12 months prior to the expiration date of the demonstration when requesting an extension under section 1115(e) of the Act or 6 months prior to the expiration date of the demonstration when requesting an extension under section 1115(a) or (f) of the Act, unless a longer time frame is specified in the Special Terms and Conditions for the original demonstration. An extension application, including an extension for the purpose of phasing out a demonstration, must be sent from the Governor of the State to the Secretary.
(2) Demonstration extension application. An application to extend an existing demonstration will be considered complete, for purposes of initiating the Federal-level public notice period, when the State provides the following: