Authorizes certain counties to establish by ordinances a rental unit price control that prohibits a landlord from increasing the rental price of a dwelling unit at a rate that exceeds the percentage calculated and published by the county based on changes in the applicable Consumer Price Index. Beginning 8/1/2025, requires certain counties to annually calculate and publish the maximum rate at which a landlord may increase the rental price of a dwelling unit during the immediately succeeding twelve-month period. Establishes a Long-Term Residential Lease Tax Credit for taxpayers who own and lease a dwelling unit located in a county that has adopted a rental unit price ceiling ordinance to a person as the person's principal residence in the State pursuant to a lease agreement of a term of one year or longer. Tax credit applies to taxable years beginning after 12/31/2025. Effective 7/1/2050. (SD1)