Del. Code tit. 29 § 6101
The term "agency," as used in this chapter, shall include every board, department, bureau, commission, person or group of persons or other authority created and now existing or hereafter to be created to execute, supervise, control and/or administer governmental functions under the laws of this State or to perform such other duties as may be prescribed or to whom any moneys are appropriated under any budget appropriation act or supplemental appropriation act or any other act which authorizes and requires any department to collect and/or use any taxes, fees, licenses, permits or other receipts for services or otherwise for the performance of any function of or related to or supported in whole or in part by the laws of this State and/or created to administer any laws providing for the collection of taxes, fees, permits, licenses or other forms of receipts from any sources whatsoever for the use of the State or any agency of the State, except the judiciary and the courts of the State.
29 Del. C. § 6101