(a) This subchapter applies to a responsible person, as defined in Texas Health and Safety Code, §361.121(a)(3), holding or applying for a Class B sewage sludge permit under §312.11 of this title (relating to Permits).(b) This subchapter does not apply to state or federal governmental entities whose debts and liabilities are the debts and liabilities of a state or the United States.(c) This subchapter does not apply to political subdivisions.(d) This subchapter establishes requirements and mechanisms for demonstrating financial assurance for environmental impairment and commercial liability insurance coverages.