In Ax 2012, country based functionality is tied to an entities primary address. Recently when setting up a demo Canadian company, we needed to enter a registration number and a software identification code.
The software identification code was easy, as explained by the help – two letters followed by 6 numbers.
The registration number took a little more though – Ax validates this number. After quickly drilling through to the validation code, we found in a lovely piece of commenting the developers had left a sample number as part of a worked example – 100000041