(a) Except as otherwise prohibited by these rules, motor and water common and contract carriers may use rail TOFC/COFC service in the performance of all or any portion of their authorized service.

(b) Motor and water common carriers may use rail TOFC/COFC service only if their tariff publications give notice that such service may be used at their option, but that the right is reserved to the user of their services to direct that in any particular instance TOFC/COFC service not be used.

(c) Motor and water contract carriers may use rail TOFC/COFC service only if their transportation contracts and tariffs (for water carriers) make appropriate provisions therefor.

(d) Tariffs of motor and water common or water contract carriers providing for the use of rail TOFC/COFC service shall set forth the points between which TOFC/COFC service may be used.