42 CFR 403.508 - Limitations.
(a) Use of grants. Except as specified in paragraph (b) of this section, and in the terms and conditions in the notice of grant award, a State that receives a grant under this subpart may use the grant for any reasonable expenses for planning, developing, implementing, and/or operating the program for which the grant is made as described in the solicitation for application for the grant.
(b) Maintenance of effort. A State that receives a grant to supplement an existing program (that is, an existing program enhancement grant) -
(1) Must not use the grant to supplant funds for activities that were conducted immediately preceding the date of the initial award of a grant made under this subpart and funded through other sources (including in-kind contributions).
(2) Must maintain the activities of the program at least at the level that those activities were conducted immediately preceding the initial award of a grant made under this subpart.