From the CASA site;
12.3 How Long are Examination Credits Valid?
Once a person has been credited with a complete pass in a particular theory examination
series, ie. CPL or ATPL, that credit is valid indefinitely.
CPL and ATPL examinations comprise seven subject parts. A pass is required in all
applicable parts with a defined period to obtain a pass in the CPL or ATPL exam. Once a
pass is obtained within the time limit for the CPL or ATPL examination, the pass is valid
indefinitely.
Where a pilot passed all the exams required for a licence or rating under a previous
system, then the pilot holds a credit for the single examination for that class of licence or
rating and it is valid perpetually.
The only exception to this is where the pilot obtained a credit in one or more, but not all,
subject examinations for a class of licence or rating prior to the introduction of single
examinations. Such a pilot would now be required to pass the single examination to
qualify for the class of licence or rating.
Notes: Pilots who hold all four credits in the previous Senior Commercial Pilot
Licence (SCPL) subject examinations are deemed to hold a credit in the
ATPL single examination. This credit remains valid indefinitely even though
the SCPL licence ceased to be valid on 31 December 1996.
Try Googling the words you used in your heading for more - that's all I did.
Cheers
