Rules proposed to prevent customers from having to cover public utilities’ expenses for lobbyists, advertising and political contributions are too weak to prevent potential abuses, critics said. A public meeting Monday drew speakers who want to see the Colorado Public Utilities Commission strengthen regulations to carry out a 2023 law that was passed after a widespread outcry over high utility bills. Besides directing utilities to look at avoiding the kind of price jumps that doubled or tripled some Coloradans’ heat bills in early 2023, Senate Bill 23-291 prohibited utilities from adding expenses for lobbying, certain advertising, public relations, political contributions and membership dues to customers’ rates. But the bill’s prime sponsors as well as a dozen Colorado organizations and a national watchdog group have argued the proposed regulations aren’t detailed or specific enough to ensure that ratepayers aren’t footing some of the bill.