Gas, Petroleum Products, Volatile Oils - As enacted, makes various changes concerning oil and gas drilling operations; specifies procedural requirements for review of certain administrative actions. - Amends TCA Title 59; Title 60 and Title 68.

HB 2535 amends Tennessee's oil and gas regulations (TCA Titles 59, 60, and 68) by updating definitions and operational requirements for drilling and production. Key changes include reducing the required buffer zone around streams from 0.5 miles to 0.25 miles for well sites, clarifying that "operator" includes those managing well operations, and strengthening permit conditions requiring compliance plans before drilling. The bill also revises terminology (e.g., replacing "crude petroleum" with "oil") and specifies that failure to follow approved plans may result in permit suspension or penalties. These adjustments directly affect oil and gas operators, regulators, and landowners near drilling sites.