A statewide system described in section
1433 of this title may include a State policy, developed and implemented jointly by the lead agency and the State educational agency, under which parents of children with disabilities who are eligible for services under section
1419 of this title and previously received services under this subchapter, may choose the continuation of early intervention services (which shall include an educational component that promotes school readiness and incorporates preliteracy, language, and numeracy skills) for such children under this subchapter until such children enter, or are eligible under State law to enter, kindergarten.