Senate committee substitute to the 1st edition makes the following changes. Removes the content of the previous edition, which amended SL 1993-222 (Charter of the City of Northwest) by dividing the City of Northwest into four geographical subdivisions that are electoral districts as shown on the existing official map of the City or of the electoral districts as they may be revised from time to time. Instead, amends the Charter of the City of Northwest as follows. Recodifies Section 3.2 of the Charter as 4.2 and amends it to provide that a candidate must reside in the district for which that person is seeking election to the Council (was, reside in the city). Adds that the City, for the purposes of conducting elections, must be divided into four geographical subdivisions to be known as residency districts. Makes Districts 1, 2, and 4 single-member districts, while District 3 is a two-member district. Allows the Council to revise the residency districts from time to time. Amends Section 3.3 to specify that members of the Council are elected to four-year staggered terms; removes outdated language. 

Specifies that the act does not affect the terms of office of any person elected in 2019 or 2021 to the Council who will continue to hold at-large positions on the Council until the end of their term or a vacancy occurs due to resignation or other causes.

Requires that in 2023 and quadrennially thereafter, two members of the Council be elected from District 3 for four-year terms; in 2025 and quadrennially thereafter, three members of the Council must be elected with one member from each of Districts 1, 2, and 4, for four-year terms.

Makes conforming changes to the act's titles.