Regional elections in
Piedmont were ruled by the Tatarella law, which was approved in 1995 and provided for a
mixed electoral system. Four fifths of the regional councilors were elected in
provincial constituencies by
proportional representation, using the
largest remainder method with a
Droop quota and
open lists, while the residual votes and the unassigned seats were grouped into a single regional constituency, where the whole ratios and the highest remainders were divided with the
Hare quota among the provincial party lists; one fifth of the council seats instead was reserved for regional lists and assigned with a
majoritarian representation system, in which the leader of the regional list that scored the highest number of votes was elected to the presidency of the region, while the other candidates were elected regional councilors.
A threshold of 3% had been established for the provincial lists, which could still have entered the
regional council if the regional list to which they were connected had scored at least 5% of valid votes. The panachage was also allowed; the voter can indicate a candidate for the presidency but prefer a provincial list connected to another candidate.