Amends GS 160D-601(d), as amended by Section 3K.1 of SL 2024-57, as follows. Allows down-zoning amendments to be initiated by a local government without the written consent of all property owners  whose property is the subject of the amendment. Removes prohibition on enacting such amendments without the written consent of the property owners whose property owners are subject to the amendment, but specifies that such amendments cannot be initiated or enforced without such written consent. Narrows the list of what is considered down-zoning under the statute by removing a zoning ordinance that affects an area of land by creating any type of nonconformity on land not in a residential zoning district, including a nonconforming use, nonconforming lot, nonconforming structure, nonconforming improvement, or nonconforming site element. Applicable only to Union County and the municipalities located therein. Effective when the act becomes law and applies retroactively to December 11, 2024. Directs that any adopted ordinance affected by Section 3K.1 of SL 2024-57 will be in effect as it was on or before December 11, 2024.