The Texas Administrative Code (TAC) is a compilation of all state agency rules in Texas. There are 16 titles in the TAC. Each title represents a subject category and related agencies are assigned to the appropriate title.

TITLE 1	ADMINISTRATION
TITLE 4	AGRICULTURE
TITLE 7	BANKING AND SECURITIES
TITLE 10	COMMUNITY DEVELOPMENT
TITLE 13	CULTURAL RESOURCES
TITLE 16	ECONOMIC REGULATION
TITLE 19	EDUCATION
TITLE 22	EXAMINING BOARDS
TITLE 25	HEALTH SERVICES
TITLE 28	INSURANCE
TITLE 30	ENVIRONMENTAL QUALITY
TITLE 31	NATURAL RESOURCES AND CONSERVATION
TITLE 34	PUBLIC FINANCE
TITLE 37	PUBLIC SAFETY AND CORRECTIONS
TITLE 40	SOCIAL SERVICES AND ASSISTANCE
TITLE 43	TRANSPORTATION

TITLE 16	ECONOMIC REGULATION
PART 1	RAILROAD COMMISSION OF TEXAS

CHAPTER 1	PRACTICE AND PROCEDURE
CHAPTER 2	INFORMAL COMPLAINT PROCEDURE
CHAPTER 3	OIL AND GAS DIVISION
CHAPTER 4	ENVIRONMENTAL PROTECTION
CHAPTER 5	CARBON DIOXIDE (CO2)
CHAPTER 7	GAS SERVICES DIVISION
CHAPTER 8	PIPELINE SAFETY REGULATIONS
CHAPTER 9	LP-GAS SAFETY RULES
CHAPTER 11	SURFACE MINING AND RECLAMATION DIVISION
CHAPTER 12	COAL MINING REGULATIONS
CHAPTER 13	REGULATIONS FOR COMPRESSED NATURAL GAS (CNG)
CHAPTER 14	REGULATIONS FOR LIQUEFIED NATURAL GAS (LNG)
CHAPTER 15	ALTERNATIVE FUELS RESEARCH AND EDUCATION DIVISION
CHAPTER 18	UNDERGROUND PIPELINE DAMAGE PREVENTION
CHAPTER 20	ADMINISTRATION