APF has approval from CASA to allow operators to drop through cloud and operate in IMC if it meets fairly strict criteria set on a case by case basis called a cloud manual. The manual sets operational standards for the specific place where they want to be able to drop through cloud.
All good in theory, in reality a lot of operators do not adhere to the manual requirements or just drop through cloud anyway even without the approval and requirements set by the APF.
No idea what the case is in Mb.