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The live chassis was never banned here in Australia. There have been transformerless sets (radios) available since the 1930's or even earlier. These were mostly imported radios or local sets made for AC/DC operation.
Monochrome TV's with a live chassis have been imported for sale here since 1956 and some local manufacturers made sets that were live chassis, though they were not a common practice.
When colour TV was introduced in 1975 the majority of sets were based on European designs or directly imported so many had a live chassis.
The use of transformerless sets was discouraged for a while (during the late 1950's or early 1960's I think) because the electricity companies did not like the effects some of these sets had on the power grid. This was mainly due to the uneven power usage of sets using half wave rectification.
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