The largest US public pension fund, the California Public Employees' Retirement System (known as CalPERS) is renewing its call for support on a proposal to require even unopposed candidates to the board of Apple to get a majority vote. The motion is part of a larger move by CalPERS to bring a majority vote rule to some 57 other US companies it has a stake in as well. Currently, Apple uses a plurality vote rule, meaning candidates simply have to get the most votes in an election -- even if that number is less than half of the overall votes.