The Commissioner of Children and Families shall, within available appropriations, establish a permanency resource exchange in this state within the Department of Children and Families. The primary purpose of the exchange shall be to link children who are awaiting placement with permanent families by providing information and referral services and by the recruitment of potential adoptive families or families interested in pursuing guardianship of such children. The department and each child-placing agency shall register any child who is free for adoption with such permanency resource exchange.