Each Administration may, if it considers that the route and the conditions of the voyage are such as to render a radiotelegraph installation unreasonable or unnecessary, exempt ships belonging to its country from the requirements of Article 27 as follows:—

1. I.

   —Passenger Ships.

   1. (a)

      Individual passenger ships or classes of passenger ships which, in the course of their voyage, do not go more than—

      1. (i)

         20 miles from the nearest land; or

      2. (ii)

         200 miles in the open sea between two consecutive ports.

   2. (b)

      Passenger ships which make voyages entirely within the restricted areas specified in the Annex to this Article.

2. II.

   —Cargo Ships.

   Individual cargo ships or classes of cargo ships which, in the course of their voyage, do not go more than 150 miles from the nearest land.