House Bill 1431, also known as Senate Bill 1457, seeks to amend Chapter 568 of the Private Acts of 1939, which has undergone several amendments since its inception. The bill specifically proposes the deletion of Article XII and its replacement with a new Article IX, which is noted to be repealed by a 2025 amendment. This change reflects an update to the governance structure or regulations pertaining to the City of Portland.

The bill stipulates that it will only take effect if approved by a two-thirds (2/3) vote of the City of Portland's legislative body. The outcome of this vote will be announced by the presiding officer and certified to the secretary of state. While the act will become effective immediately for the purpose of approval or rejection, it will only be fully effective for other purposes once the legislative body's approval is secured.