Sick joke.
If CAO 48 meant anything at all there would be no requirement for exemptions or FMS.
It is SOP in many operations to work for months without a day off and pull 36 hour shifts. Some do longer. The touchy feely FMS etc angle is all lip service.
And be obliged to sign a flight/duty time roster indicating something quite legal at the end of it.
It is endemic, those that fight it tend to be unemployed.