A merger fire protection district located in a single county, that merged with a merging fire protection district located in another county or counties, shall be identified by the name of each county in which the fire protection district is located, listed alphabetically, followed by a number that is the next highest number available for a fire protection district in the one of these counties that has the greatest number of fire protection districts.

This section does not apply to partial mergers under RCW 52.06.090.