I am wondering about that too... we started the application, then I had to go to the US for work for the past year... recently Seoul office asked for police check for Korea and we sent that in.
Being the keeners that we are, we thought we'd cover the bases and go get the US one too from the FBI. Part of that required getting fingerprinting done at the local police office in Canada (came back to Canada now). Funny thing was, at the police office the clerk started asking my wife all sorts of questions that were questionnable and invasive and basically was suspicious of why she needed to get a US police check if the CIC didn't ask her yet. That freaked us out so we haven't gone ahead with it since Seoul office haven't asked and (please verify) doesn't the procedure require you to submit police check at time of application? Since we moved to another country during the application, is this a grey area or is there specifically a section written down that requires it regardless? If so, has anyone else had a troubling experience with Canadian police enforcement giving you a hard time?