All seats in a municipal assembly are permanent seats. If a municipality is divided into several constituencies, the county administrative board shall no later than 30 April in the year when a general election is to be held decide on how many seats each constituency shall have. This shall be done in the following way.

The number of persons who are entitled to vote in the municipality are divided by the number of seats and thereafter the number of persons who are entitled to vote in each constituency is divided by the figure that is the product of this calculation. The constituency shall obtain one seat for each time that the number of persons who are entitled to vote in a constituency is evenly divisible by this figure.

Unless all seats can be distributed in this way, the constituencies will obtain the remaining seats in order according to those surpluses that arise upon the calculation. If the surplus figure is the same in two or more constituencies, the constituency that will obtain the seat shall be determined by drawing lots.

The Government or the authority that decides on alterations to the division of Sweden into county councils or municipalities may, if necessary, determine that a decision on the distribution of seats may be made later than as provided by the second paragraph.