(1) Every public utility and telecommunications utility shall give immediate notice by telegraph, telephone or personally, to the Public Utility Commission whenever any accident occurs within this state upon its premises, or directly or indirectly arises from or is connected with its maintenance or operation, if the accident is attended by loss of human life or limb or serious injury to person or property.
(2) The Public Utility Commission may, if the commission deems the public interest requires it, investigate each such accident forthwith, after giving the public utility or telecommunications utility involved reasonable notice of the time and place of such investigation.
(3) The Public Utility Commission may adopt and amend rules and regulations governing the form and content of reports to the commission to enable the commission to ascertain relevant facts and circumstances attending such accident and the causes thereof. Whenever the original report is insufficient, in the opinion of the commission, the commission may require the public utility or telecommunications utility to file supplemental reports of accidents.