(a) This subtitle applies only to:
(1) guardianship of an individual who is committed to a local department as a child in need of assistance;
(2) adoption of an individual who is committed to a local department as a child in need of assistance, without prior termination of parental rights as to the individual; and
(3) adoption of an individual under guardianship under this subtitle.
(b) This subtitle:
(1) does not apply to a guardianship case filed on or before December 31, 2005, until guardianship is granted; and
(2) unless otherwise specified, does not apply to an adoption case filed on or before December 31, 2005.