Parents citizenship application

[shai44240]

I have a few questions regarding the online Canadian citizenship application for my parents:

1. Should the Police Clearance Certificate (PCC) be uploaded under the "Other Documents" section (the last tab) of the online application?
2. Does the scanned copy of the PCC need to be self-attested?
3. Do I need to submit my parents' Notices of Assessment (NOAs) or bank statements? They have filed their Canadian income taxes every year.
4. Both of my parents are over 70 years old, and I plan to submit their applications once they reach 1,097 days of physical presence. Is there anything else I should be aware of?

Thank you for your guidance.