Public Employees Relations Commission; Revises provisions relating to certain final orders issued by PERC; specifies annual salaries of chair & other commissioners of PERC; revises provisions for delivery of service; requires employee organization, within specified timeframe, to revoke membership of, & cease collection of membership dues from, public employee; revises requirements for registration, registration renewal, certification, recertification, or decertification of employee organizations; removes provisions relating to revocation of certification of employee organizations; requires commission or one of its designated agents to conduct investigation if challenge is filed; provides prohibitions on public employers, their agents or representatives, & any person acting on their behalf; revises provisions relating to impasse; authorizes certain actions by public employees upon agreement between public employer & bargaining agent; provides exceptions for certain bargaining units; increases fines for certain violations.