1. (a) Invoice filing deadline. Invoices must be submitted to the Administrator by the latest of:

   1. (1) 120 days after the last day to receive service;
   2. (2) 120 days after the date of the Funding Commitment Decision Letter;
   3. (3) 120 days after the date of the Revised Funding Commitment Decision Letter approving a post-commitment request made by the applicant or service provider or a successful appeal of a previously denied or reduced funding request that is impacting requests for reimbursement, whichever is latest; or
   4. (4) 60 days after the date of the first notification of a denial or reduction of a timely filed request for reimbursement.
2. (b) Invoice filing deadline extension. Service providers or billed entities may request a one-time extension of the invoicing filing deadline if such request is filed before, or within 15 days after, the deadline calculated pursuant to paragraph (a) of this section. The Administrator shall grant a 120-day extension of the invoice filing deadline calculated in paragraph (a) of this section if it is timely requested. The Commission may find good cause for a waiver of the invoice filing deadline extension rule and a one-time extension of 120 days from the original invoicing deadline for requests for waiver where the Petitioner can demonstrate that they attempted to file for an extension within 15 days of the original invoice filing deadline.
3. (c) Choice of payment method. Service providers providing discounted services under this subpart in any funding year shall, prior to the submission of the FCC Form 471, permit the billed entity to choose the method of payment for the discounted services from those methods approved by the Administrator, including by making a full, undiscounted payment and receiving subsequent reimbursement of the discount amount from the Administrator.

[79 FR 49203, Aug. 19, 2014, as amended at 86 FR 9027, Feb. 11, 2021; 91 FR 29070, May 19, 2026]