The bill Walker signed Wednesday changes current law, which lets the chief inspector or municipal clerk designate areas for election observers to stand.
Walker also signed a bill requiring that an equal number of people nominated by the Republican and Democratic parties serve as poll workers.
A third bill Walker signed allows election officials to stop counting most names entered as write-in candidates. Current law requires every vote be counted but election officials say that can be a time-consuming process.
The new law requires in most cases that write-in candidates only be counted for registered candidates.