"Petroleum", "natural gas", "oil", and "barrel of oil" defined

Ind. Code § 6-8-1-5, under Chapter 1. Petroleum Severance Tax.

Ind. Code § 6-8-1-5

Sec. 5. (a) As used in this chapter, "petroleum" means all hydrocarbons produced at a well in a liquid or gaseous state. (b) As used in this chapter, "natural gas" means petroleum that maintains a gaseous state at atmospheric conditions. (c) As used in this chapter, "oil" means petroleum that maintains a liquid state at atmospheric conditions. (d) As used in this chapter, "barrel of oil" means forty-two (42) U.S. gallons of oil at sixty degrees Fahrenheit (60E F). Formerly: Acts 1947, c.278, s.5. As amended by P.L.109-1988, SEC.9.