Although the California Occupational Health and Safety Administration wrapped up its investigation into the fatal "Twilight Zone" accident by levying more than $60,000 in fines, Warner Bros. may not yet have seen the last of the fallout from that film. Last week, the California State Senate and Assembly conducted joint hearings on the subject of film safety and they're currently considering two potentially restrictive options. First, both state Sen. Bill Greene and assemblyman Chet Wray say that they may support legislation to toughen Hollywood's safety standards; of California's part in regulating film safety, Wray says, "It's going to require some legislation to fine-tune and clarify government's role." (The Screen Actors Guild, the Screen Extras Guild, Camera Local 659 and Teamsters Local 399 all appeared before the committee to support such legislation, while the Directors Guild and the Alliance of Motion Picture and Television Producers opposed it.) And of more immediate threat to Warner's, state labor commissioner Patrick W. Henning warned after the hearings that he may well "pull the plug" on Warner Bros. and deny the studio any further work permits for child actors. The commission has already fined many of the principals involved $5,000 each, but Henning opened the door for stiffer penalties, particularly if the Los Angeles district attorney concludes his own investigation by filing any charges. "If the DA indicts Warner Bros. for wilfull intent," said Henning, "we'd pull their permits for as long as we want."