OK from what i have read, appendix B is a request to get ur fingerprints, so take append B with you when you go get ur fingerprints done and append A is to be sent with your fingerprints for ur record, not sure if its to FBI or RCMP,does that make any sense?
it says when applying for police cert. you must include for each person a completed Append A
this is jsut from what ive glanced over, i am doing outland so i would wait for more answers before u set this in stone.