If you have convictions in Canada and convictions/offenses outside of Canada, both an approval of rehabilitation and a pardon are required to overcome your inadmissibility.
Note: Your request for rehabilitation cannot be made until you have first obtained a pardon, except if you have only one summary conviction in Canada. In such instances, you may submit an application for rehabilitation for any convictions/offenses outside Canada if you can provide evidence that you have submitted an application for a pardon to the National Parole Board.