Contact the Railroad Commission to determine if the subject entity has filed an "Application to Operate Pipeline," Form T-4 and whether the form has been approved by the Commission. Request a copy of the approved Form T-4 and the "Permit to Operate Pipeline," Form T-4A. The Railroad Commission has established a site to verify the T-4 information. By law, the Railroad Commission has the responsibility to monitor the placement of all oil and gas lines within this state and their website can provide further information on oil and gas lines.

This contact is made to ensure that the entity has filed the necessary Railroad Commission form for approval and provides the department opportunity to review Form T-4, for the purpose and intent of the subject line. The entity may be incorporated to do business within this state and the Application to Operate Pipeline, Form T-4 filed and approved indicating it is a common carrier or a gas utility. This assures that an entity legally exists. However, the data is further reviewed to ensure that the specific line in question is to be or is being used for public purposes rather than for private purposes.