Local departments shall ensure that any individual who was in foster care on his eighteenth birthday is enrolled, unless the individual objects, in the Commonwealth’s program of medical assistance established pursuant to § 32.1-325, provided that such individual is eligible to receive health care services under the Commonwealth’s program of medical assistance and was enrolled in such program on his eighteenth birthday. Prior to enrollment, local departments shall provide such individuals with basic information about health care services provided under the state plan for medical assistance services and inform such individuals that, if eligible, they will be enrolled in the Commonwealth’s program of medical assistance unless they object.