South Dakota Laws > Title 5 > Chapter 7 > § 5-7-18 South Dakota Codified Laws 5-7-18. Oil and gas leases–Casing-head gas included Current as of: 2023 | Check for updates | Other versions Where the term “oil and gas” is used in §§ 5-7-19 to 5-7-33, inclusive, it shall be construed to mean “oil, gas, and casing–head gas.” Ask a legal question, get an answer ASAP!Click here to chat with a lawyer about your rights. Source: SDC 1939, § 15.0510 as added by SL 1941, ch 53, § 1. Previous sectionNext section Chapter 7 Contents