GENERAL TERMS AND CONDITIONS (Continued)
   
21.  SUPERVENING LAWS AND CHANGES BY THE TRANSPORTER
   
        21.1 This Tariff, including these General Terms and Conditions, and
the respective obligations of the parties under the Gas Transportation
Contract(s), are subject to valid laws, ordinances, orders, rules and
regulations of duly constituted authorities having jurisdiction and are
subject to change from time to time by addition, amendment or substitution as
provided by law.
   
        21.2 Transporter shall have the right to unilaterally file, from time
to time and in the manner provided by law, such changes in its Tariff and/or
Rate Schedules as Transporter may find necessary.