This is what's written in the PPR:
STEP 3: PREPARE YOUR DOCUMENTS
You must submit together:
1. One copy of this letter.
2. Passport(s)
OR photocopy(ies) of passport(s), as explained in
Step 2.
3.
Two (2) photos of yourself and of each accompanying family member. Photos MUST meet the precise specifications found in the link below or in Appendix A at the end of this letter. If you submit photos that do not meet the exact specifications, your package will be returned to you.
www.cic.gc.ca/english/information/applications/guides/pdf/5445EB-e.pdf
4. If not yet paid, Right of Permanent Residence Fee (RPRF) for you and your accompanying spouse (if applicable). We strongly encourage you to pay your fees online and provide a copy of the receipt. To pay your fees online, click here:
https://eservices.cic.gc.ca/epay/welcome.do.
5. The height and eye colour (for both eyes) for the Principal Applicant and all of his accompanying dependants