Exempting from the property tax property that is owned by the City of Hagerstown and used primarily for public social, recreational, and entertainment purposes; establishing that the exemption from the property tax for certain property owned by the City of Hagerstown or the Hagerstown Multi-Use Sports and Events Facility shall apply retroactively beginning with fiscal year 2024; and requiring the State, Washington County, and the City of Hagerstown to pay a refund for any excess property tax paid due to the retroactive exemption.