@lossada: I am planning to complete my landing formalities in the upcoming month and while my short stay in Canada, my COPR will expire. I am traveling from India so using International airport for my first entry. Do I need to EXIT Canada before my COPR expiry date?forget the medical exam date, you have a valid CoPR till 2018-APR-13.
http://www.cic.gc.ca/english/immigrate/provincial/arrival.asp
http://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=748&top=22
you have till 2018-APR-13 to land, once you CoPR expire, you are no allow to exit Canada till you PR Card arrives.
once you land and meanwhile your CoPR is valid, you are allowed to go out and enter to Canada, by land using private vehicle, if you have a valid US Visitor Visa.