Del. Code Ann. tit. 4, § 1315
(a) A public officer or employee of the State, including the members of any board, commission, conservation district or agency of the State, whether elected or appointed, and whether now or previously serving as such, and any contractor or volunteer performing work for the State, whose job functions include, assist, support, regulate, approve, or authorize any of the conduct authorized by this chapter are not subject to arrest, prosecution, or the denial of any right or privilege, including any criminal or civil penalty or disciplinary action by a court or occupational or professional licensing board or bureau where the conduct of the public officer or employee, contractor, or volunteer meets all of the following: