They have released "Plain English Guides" for several areas. The plain english one to explain CAO48.1 I found to be more difficult to read than the actual CAO (that might be just me maybe but my eyes glazed over at the following plain english paragraphs:
An FDP commencing at 0900 allows a maximum FDP of 11 hours. This may be extended by 4 hours (to 15 hours) by use of an SDRP (in sleeping accommodation) of 4 hours. The first 4 hours of the SDRP can be reduced to 2 hours for the purpose of the ODP calculation. The 15 hour duty period is therefore deemed to be 13 hours (which is 1 hour in excess of 12).The subsequent minimum ODP required is 12 hours plus (1.5 *1) = 13.5 hours.
After 3 consecutive WOCL infringements, you must have an off-duty period over a local night. You are permitted to infringe the WOCL more than 3 times only in accordance with the early start provisions above.A duty that falls within any part of the WOCL means the WOCL is infringed
https://www.casa.gov.au/sites/defaul...ve-version.pdf
I think the best idea is to not let your f'dup impinge on your wocl.