The person in charge of cargo transfer may not authorize cargo discharge by gas pressurization unless:

1. (a) The tank to be offloaded is an independent tank type B or C;
2. (b) The pressurizing medium is the cargo vapor or a nonflammable, nontoxic gas that is inert with the cargo; and

3. (c) The pressurizing line has:

   1. (1) A pressure reducing valve that has a setting that is 90 percent or less of the tank's relief valve setting; and
   2. (2) A manual control valve between the pressure reducing valve and the tank.