It insisted workers, who must hold hard-to-get travel permits, be escorted everywhere.

Campaigners have called for the old-style travel permits to return.

Almost all of them lie in aboriginal lands which require travel permits.

Travel permits may take at least 24 hours to be issued and are easiest to obtain through a travel agent.

All travelers were required to submit to an examination of their travel permits, and taxes were levied on commercial travelers with merchandise.