Folks,
Perhaps not surprisingly for pprune, there is a lot of rubbish about the SCPL on this thread.
The SCPL was an ICAO license, not an Australian invention, the criteria for getting an SCPL were somewhat less than an ATPL.
About the only odd practice in AU (but not the only one) was that, once you ceased to be an "airline Captain", the license reverted to an SCPL, whereas, elsewhere once you had an ATPL, you kept it.
When ICAO phased out the SCPL, so did Australia.
Tootle pip!!
PS: Fathom is pretty close as to the "privileges" of the SCPL/ATPL