Senate committee substitute to the 1st edition organizes the previous sections into Part I and adds the following content. Amends the act's titles.

Part II.

Authorizes the Town of Mills River to adopt unified development ordinances as presented to the Town Council in October 2024 notwithstanding specified state law. Directs that the adoption must occur on or before October 1, 2025.

Part III.

Authorizes Henderson County to amend definitions in its unified development ordinance to eliminate or modify uses allowed by right in all zoning districts. Requires the amendments be consistent with GS Chapter 160D except as provided in the notwithstanding clause. Directs that any amendment occur on or before October 1, 2025.

Part IV.

Prohibits any municipality in Henderson County (County) from exercising planning and development authorities under GS Chapter 160D or Article 19, GS Chapter 160A, outside of its contiguous corporate limits. Directs that relinquishment of municipal jurisdiction over an area regulated pursuant to these authorities is effective July 1, 2025. Provides that the municipality's regulations and powers of enforcement are effective until the sooner of either the County adopting the regulation or 60 days following relinquishment. Authorizes the County to hold hearings and take other actions authorized under GS 160D-204 relating to pending jurisdiction as the County adopts and applies its regulations to the area for which municipal jurisdiction is relinquished. Provides for continued vestiture of rights acquired under municipal jurisdiction. Allows the County, upon acquiring jurisdiction, to take development actions that could have been taken by the municipality, and makes buildings, structures, and land use in the acquired jurisdiction subject to the County's development regulations.

Part V.

Applicable only to Henderson County and those municipalities located wholly within the County, requires approval of the governing bodies of the County and the municipality before any area that is included in property annexed by the municipality under Parts 1 or 4 (extension of corporate limits by petition; annexation of noncontiguous areas), Article 4A, GS Chapter 160A can be rezoned. Applies to annexations initiated on or after July 1, 2025.

Part VI.

Provides that the act is effective on the date the act becomes law, except as otherwise provided.