(a) Each corporation shall establish procedures to analyze each failure or accident for the purpose of determining its cause and to minimize the possibility of a recurrence. This shall include a procedure to select samples of the failed facility or equipment for laboratory examination when necessary.

(b) The procedures shall also provide for complete cooperation with the department's gas division in testing or surveying, including using independent consultants, any equipment or systems deemed necessary by the gas division for the investigation and analysis of any failure or accident to determine its cause and to minimize the possibility of a recurrence.