Del. Code tit. 24, § 2720

Neither this State, nor any of its political subdivisions, such as counties, incorporated cities and towns, or other political entities or legally constituted boards, commissions, or authorities, or officials, or employees thereof, shall permit the commencement or continuance of any public work involving land surveying unless the field surveying shall be directly supervised by, and all drawings and documents as a result thereof, shall be prepared or certified by, a professional land surveyor licensed under this chapter, or a person authorized under Chapter 28 of this title to practice professional engineering in this State.