This program is established under Texas Health and Safety Code (THSC), Chapter 394. In accordance with THSC, §394.002, the TCEQ is to establish and administer the Texas Natural Gas Vehicle Grant Program (TNGVGP) to encourage an entity that has a heavyduty or medium-duty motor vehicle to repower the vehicle with a natural gas engine or replace the vehicle with a natural gas vehicle. Under the program, the TCEQ is to provide grants to offset the incremental cost for replacing or repowering eligible heavy-duty and medium-duty motor vehicles with vehicles and engines powered by natural gas. Further authority is contained in Texas Water Code, Chapter 5, Subchapter D, Section 5.124 (authority to award grants) and the Texas Water Code, Section 5.229, pertaining to the TCEQ’s general authority to enter grants.