34 C.F.R. § 76.710
Obligations made during a carryover period are subject to current statutes, regulations, and applications
A State and a subgrantee shall use carryover funds in accordance with:
(a) The Federal statutes and regulations that apply to the program and are in effect for the carryover period; and
(b) Any State plan, or application for a subgrant, that the State or subgrantee is required to submit for the carryover period.