A change in governance arrangements which a local authority proposes to make by resolution is subject to approval in a referendum in either of the following cases.
The first case is where—
the proposed change in governance arrangements is of a kind set out in—
section 9K (change from one form of governance to another), or
section 9KA (change to a different form of executive), and
the implementation of the local authority's existing form of governance or existing form of executive was approved in a referendum under this Chapter.
The second case is where the local authority resolves that a proposed change in governance arrangements is to be subject to approval in a referendum.