Del. Code Ann. tit. 7, § 570
Dogs may be trained and field trials conducted, when properly licensed, upon restricted preserves on any day, including Sundays, except during the months of March through August, inclusive.
Code 1935, § 2811A; 47 Del. Laws, c. 295, § 1; 7 Del. C. 1953, § 588; 70 Del. Laws, c. 275, § 40