House Bill 2648 amends various sections of Chapter 76 of the Private Acts of 1917, which governs the city of Kingsport. Key changes include the appointment and functions of the vice-mayor, who will act in the absence of the mayor and assume the role if a vacancy occurs. The bill also modifies the due date for taxes, establishing that all taxes, except for certain specified types, are due on November 30 of the assessment year, and outlines the treasurer's responsibilities as the tax collector. Additionally, it revises the process for preparing and adopting the tentative appropriation ordinance, ensuring public participation in the budget process.

Further amendments address the election and terms of the board of education members, specifying that they will be elected for four-year terms and outlining the process for filling vacancies. The bill clarifies that it does not remove any current officeholders or shorten their terms and includes a severability clause to maintain the validity of the remaining provisions if any part is found invalid. The act requires a two-thirds vote from the legislative body of Kingsport for approval and will take effect upon becoming law for the purpose of approval, while other provisions will take effect as specified.