45 C.F.R. § 95.25 When to request a waiver for good cause.
Title 45 - Public Welfare
The State should request a waiver in writing as soon as the State recognizes that it will be unable to submit a claim within the appropriate time limit.
Title 45: Public Welfare
PART 95—GENERAL ADMINISTRATION—GRANT PROGRAMS (PUBLIC ASSISTANCE, MEDICAL ASSISTANCE AND STATE CHILDREN'S HEALTH INSURANCE PROGRAMS)
Subpart A—Time Limits for States To File Claims
§ 95.25 When to request a waiver for good cause.

