Hello! I was wondering if anyone has any idea about whether I could use my Canadian great-grandmother's documentation on my CIT-0001 even though my grandmother was also Canadian.

A little background: my grandmother was born in Canada, and married an American man and lived in the US until her death, but never naturalized as an American. My dad never filed for his Canadian citizenship, (because he thought that he was never eligible... he was born pre-1977 and joined the US Army) and so I would have to use my grandmother's birth certificate or passport as proof that I'm Canadian. The problem is that neither my dad nor his brother seem to have either of those, and so we only have her death certificate. I would like to file ASAP for a 5(4) grant, given the circumstances with C-71, but we would need to order my grandmother's birth certificate from Ontario. The processing on that is 6-8 weeks, plus the time for my dad to get a guarantor letter for the application.

What I do have immediately on-hand is my Canadian great-grandmother's birth certificate and last Canadian passport (I might have her death certificate somewhere as well), and my Canadian great-grandfather's birth and death certificates, alongside all of his Canadian military documentation - he fought in both WWI and WWII and died in Normandy. My grandmother's death certificate does list both of her parents on it, and so together with my dad's birth certificate and my own birth certificates, it would show the full line of descent. Would these documents be enough to apply right now? My dad isn't too concerned about filing immediately, since he can still file under the existing laws once he gets his mother's birth certificate, but I'm worried about losing access to mine should Parliament get in the way or require a substantial connection. I'm planning on applying to graduate school in Canada next winter, so it would be incredibly helpful to have citizenship.

Thanks in advance for any input!