For a joint account to have AI status, all joint account holders have to Opt In as AI for that particular joint account.
For accounts where one or more joint account holders are non-AI eligible, the joint account may be treated as AI if:
(a) at least one joint account holder has been assessed to meet the AI-eligibility criteria and has Opted In to be treated as an AI; AND
(b) ALL joint account holders of that account must have (and continue to remain being Opted In) Opted In to be treated as an AI for that account.
You may be treated as AI only when dealing with respect to a joint account with an AI status after having met the above listed (a) and (b) conditions.
In this case, if you are personally non-AI eligible, your Opt In is effective only in respect of the relevant AI joint account(s) only and not other accounts in which you are the sole account holder or other joint accounts where there is no AI joint account holder.