(1) A person is eligible for case management as a person with developmental disabilities if the person:

(a) is receiving Medicaid;

(b) is 16 years of age or over; and

(c) has a developmental disability.

(2) Case management services are not available to:

(a) a person residing in an intermediate care facility for the mentally retarded (ICF/MR) or in a Medicaid certified nursing facility except as provided for in (3); or

(b) a person receiving case management services under a home and community-based waiver program authorized under section 1915 (c) of the Social Security Act.

(3) A person residing in a Medicaid certified nursing facility or intermediate care facility for the mentally retarded (ICF/MR) may receive case management services during the 30 day period immediately preceding the scheduled discharge from a nursing facility in order to coordinate postdischarge services in a noninstitutional setting.