Authorizing the public utilities commission to create standing or ad hoc subcommittees for powers and functions delegation purposes; subcommittee decisions to be considered decisions of the full commission, requiring referral to the full commission upon objection or request; authorizing the PUC to designate lead commissioners to develop evidentiary record for proceedings, recommendations to be advisory; providing for deemed approval of filings with the commission unless set aside for affirmative action by the PUC, excepting complaint filings and certain petitions, specifying certain PUC notice publication requirements; sunset provision (Ch. 125, 1999)