Library tax or appropriation not to be decreased when city becomes city of first class or consolidated local government

first class or consolidated local government. Any library established or maintained pursuant to the provisions of KRS 173.310 to 173.410 shall not, upon becoming a city of the first class, or a consolidated local government, or a county containing a city of the first class, have its tax levy or appropriation decreased except by the procedure in KRS 173.790.