(a) Subject to an assessment of sponsor suitability, when ORR determines that the detention of the unaccompanied child is not required either to secure the child's timely appearance before DHS or the immigration court, or to ensure the child's safety or that of others, ORR shall release a child from its custody without unnecessary delay, in the following order of preference, to:

1. (1) A parent;
2. (2) A legal guardian;
3. (3) An adult relative;

4. (4) An adult individual or entity designated by the parent or legal guardian as capable and willing to care for the unaccompanied child's well-being in:

   1. (i) A declaration signed under penalty of perjury before an immigration or consular officer; or
   2. (ii) Such other document that establishes to the satisfaction of ORR, in its discretion, the affiant's parental relationship or guardianship;
5. (5) A licensed program willing to accept legal custody; or
6. (6) An adult individual or entity seeking custody, in the discretion of ORR, when it appears that there is no other likely alternative to long term custody, and family unification does not appear to be a reasonable possibility.