California Code, Education Code - EDC § 56443

(a) The department shall amend its interagency agreement with the Administration for Children, Youth, and Families, Region IX, Head Start, United States Department of Health and Human Services, to permit a local educational agency to contract with a Head Start program for special education and services for individuals with exceptional needs between the ages of three and five years pursuant to this part.

(b) Apportionments allocated to Head Start programs for special education and services to individuals with exceptional needs between the ages of three and five years shall supplement and not supplant funds for which the Head Start programs are eligible, or are already receiving, from other funding sources.