I also don't see why a CPL should be at the controls of a 1900 simply because of a loop hole in the wording of the CARS.
(We all know that was not the intention...)
Before all the CPL's jump on my back, ask yourself this:
Do you really think the Operator went through all the Legal Drivel in order to give you CPL's a "break". (I think not)
They do it to get Cheaper Labour (i.e. screwing you) while at the same time pocketing the difference in fees paid by the Contract Originators.
Rather sit on your bhind, write the exams, get the rating while demanding to get paid what you are worth. That stimulates growth (personally) as well as for the rest of the Industry in SA.
PS. We were ALL CPL's (and even SPL's) once...