§ 6605. Preexisting use [For application of this section, see 85 Del. Laws, c. 351, § 4]. Unless otherwise exempt through regulation, any expansion or extension of a preexisting use of wetlands requires a permit.7 Del. C. 1953, § 6605; 59 Del. Laws, c. 213, § 1; 85 Del. Laws, c. 351, § 1;