The Local Government Boundary Commission for England (LGBCE) completed its last review on the electoral arrangements for Gravesham in 2022.
Details of the changes are contained in a report which explains how they have been developed, including how they considered local views.
The recommendations became law once they received parliamentary approval.
The formal document (an Order) was made by Parliament on 15 November 2022. This is called The Gravesham (Electoral Changes) Order 2023.