It is the purpose of this chapter to promote the efficient and accurate collection, accounting and receipt of support for financially dependent children and their custodians, and to further the effective and timely enforcement of such support while ensuring that all functions in the Department are appropriate or necessary to comply with applicable federal law. Nonattorney employees of the Department are authorized to complete, sign and file petitions and motions on forms approved by the Supreme Court of Virginia relating to the establishment, modification, or enforcement of support in Department cases in the juvenile and domestic relations district courts. Orders entered prior to July 1, 2008, shall not be deemed void or voidable solely because such petitions and motions were signed by nonattorney employees. When so ordered by the court or the Department, support for financially dependent children and their custodians shall be paid by obligors to the Department’s State Disbursement Unit (SDU) or in district offices located within the Commonwealth for processing by the SDU. The Department shall have authority to enter into contracts with any appropriate public or private entities to enforce, collect, account for and disburse payments for child or spousal support. The Division of Child Support Enforcement within the Department shall be authorized to issue payments to implement the disbursement of funds pursuant to the provisions of this section.