La. Stat. tit. 45 § 258
All common carriers of petroleum shall make and publish their tariffs and charges according to such reasonable rules and regulations as may be prescribed by the commission, which may require them to make reports and may investigate all their books and records kept in connection with their business. Upon petition of any shipper alleging injury or showing substantial basis to fear injury by reason of inadequate facilities as defined in this Chapter, the commission may require from such common carrier pipe line, reports duly verified under oath, of the total quantities of petroleum, owned by such pipe line as held by them in its distribution system, provided no publicity shall be given by the commission to the reports as to stock of petroleum on hand of any particular pipe line, but the commission in its discretion, may make public the aggregate amounts held by all pipe lines making these reports, and of the aggregate unfilled storage capacity and where situated. The commission has authority to hear and determine complaints, to require attendance of witnesses, pay their expenses and to institute suits and sue out such writs and process as may be necessary for the enforcement of its orders.
La. R.S. § 45:258