Section 631. Disposition on adjudication of permanent neglect

At the
  conclusion of a dispositional hearing on a petition for  the  commitment
  of  the  guardianship  and  custody of a child, the court shall enter an
  order of disposition:
    (a) dismissing  the  petition  in  accord  with  section  six  hundred
  thirty-two; or
    (b)   suspending   judgment   in   accord  with  section  six  hundred
  thirty-three; or
    (c) committing the guardianship and custody of  the  child  in  accord
  with  section  six hundred thirty-four; provided, however, that an order
  of disposition committing the guardianship and custody of the child  may
  not  be  entered after the child's eighteenth birthday, unless the child
  consents.
    An order of disposition shall  be  made,  pursuant  to  this  section,
  solely  on the basis of the best interests of the child, and there shall
  be no presumption that such interests will be promoted by any particular
  disposition.