thank you so much for your answer! so my husband is on TRY (visit visa) and as he did not get the job he was waiting for oversea (they havent given the answer and the interview process is taking months) we thought its better he stays here and applies inland to be able to work as our baby is 4 months. I wanted to make sure they wont reject if he only has TRV (valid until 2027 and he can stay in the country until Jan 2020 (6 months). He will probably travel outside of the country before getting the owp or pr, but he is aware of the possible consequences (eg. the border services officer is the one to decide of reentry).
So if I understands, once he gets the permit he cannot work until he gets the SIN number. Once he gets it, he can start working and file for taxes? Then, when he gets PR, he has to apply for new SIN number?
Does everyone get a landing interview? What is a landing interview if the PA is already in the country?