Last May, the Canadian Council of Insurance Regulators (CCIR) issued a public consultation document on this very topic, at:
https://www.ccir-ccrra.org/en/init/Elec_Commerce/Issues%20Paper-Electronic%20Proof(ENG).pdf

Some of the concerns identified in the paper include : 
- Will law enforcement be allowed to access other information/content on electronic devices used to demonstrate proof of insurance?
- If law enforcement questions the validity of EPAI, are they allowed to confiscate the electronic device?
- Who is responsible if electronic devices used to demonstrate proof of insurance, such as mobile device, are damaged during inspection?
- What is considered “reasonable inspection” for law enforcement handling electronic devices?
- When travelling to a jurisdiction that does not yet allow for the EPAI, what steps must be taken? 
- If an electronic device malfunctions, has no network access or is out of power, how will law enforcement handle such issues?
...and more