If a federally eligible child described in Section 11386 has one or more siblings who are not so described, the child and any sibling of the child may be placed in the same kinship guardianship arrangement, in accordance with Section 671(a)(31) of Title 42 of the United States Code, if the county child welfare department or probation department or Indian tribe that entered into an agreement pursuant to Section 10553.1 and the prospective relative guardian agree on the appropriateness of the arrangement for the siblings. Kinship guardianship assistance payments may be paid on behalf of each sibling, at a per-child rate, placed in accordance with this section.