zone-tariffhttp://www.oed.com/dictionary/zone-tariff_n%3Ftab%3Dmeaning_and_usezone tariff, n.
First published 1921; not fully revised

zone tariffnoun

  1. 1891–
    1. 1891
      A system of zone tariffs.
      Economic Journal vol. 1 507
    2. 1902
      A zone-tariff system..whereby the country is mapped out into zones, and the traveller pays according to the number of these he passes through.
      Encyclopædia Britannica vol. XXXII. 153/2

Originally published as part of the entry for zone, n.

zone, n. was first published in 1921; not fully revised.