Creamie,
Actually only for about three decades.
Qantas had been using Jepps for years, having changed from Airad, when some inspired DoT/ATG or CAA bright spark decided that only charts produced by whatever Airservices was called at the time was "legal" for an Australian operator.
So, QF had been operating "illegally" since the inception of international services.
The same "auditor" also queried the world wide topos we carried -- US produced ONC series, on the basis they were not adequate for pilots to determine LSA in flight --- and the Airad or Jepp. LSAs (by whatever name) were not "approved".
Such fond memories of such wonderful contributions to "air safety". To this day, we have some FOIs who will not accept a full Jepp. service meets the requirements of CAR 233. Strange, but true.
Tootle pip!!