Sec. 121.152.  INITIATION OF REGULATORY PROCEEDING.  The railroad commission shall exercise power under Section 121.151:
(1)  on:
(A)  its own motion;
(B)  the petition of a person or county commissioner's precinct showing a substantial interest in the subject;
(C)  the petition of the attorney general;  or
(D)  the petition of a district or county attorney of a county in which any portion of a business subject to this chapter is conducted;  and
(2)  after notice has been given.
Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.