45 CFR § 95.1 - Scope.
(a) This subpart establishes a two year time limit (15 months in some cases) for a State to claim Federal financial participation in expenditures under State plans approved under the following titles of the Social Security Act:
Title I—Grants to States for Old-Age Assistance and Medical Assistance for the Aged.
(b) This subpart also applies to claims for Federal financial participation by any State which are based on any provision of the Act that is enacted after issuance of these regulations and that provides, on an entitlement basis, for Federal financial participation in expenditures made under State plans or programs.
(c) This subpart explains under what conditions the Secretary may decide to extend the time limit for filing claims when a State believes it has good cause for not meeting the time limit.