This title does not apply to a transaction of: the United States or an instrumentality of the United States; or a state or an instrumentality or political subdivision of a state. A county or municipal corporation of the State may not: require a person to get authorization to do business performing or selling a home improvement; or regulate the qualifications necessary to do that business. This title does not limit the power of a county or municipal corporation: to regulate the character, performance, or quality of a home improvement by having a system of inspections and permits designed to: ensure compliance with and help to enforce applicable State and local building laws; or enforce other laws necessary to protect the public health and safety; or to adopt a system of inspections and permits that requires: submission to and approval by the county or municipal corporation of plans and specifications for an installation, before construction of the installation begins; and inspection of work done.