[19A. Other powers---(1) Nothing in section 19 of this Act shall limit
 or affect any other power to enforce a right of custody or access
 exercisable by any Court at the commencement of this Act.

   (2) Where a Court exercises a power to which subsection (1) of this
 section applies, the Court shall not grant any application contrary to
 the wishes of the child if the child is of or over the age of 18 years,
 unless the circumstances are exceptional.

   (3) Where, in the exercise of a power to which subsection (1) of this
 section applies, a Family Court declines to enforce a right of custody
 or access, it may of its own motion, but subject to subsections (1) and
 (2) of section 22C of this Act, vary or discharge any existing order of
 custody or access accordingly.