I'm not really sure how long the process for whitelisting works, or how long it works, but it should have been done once you passed your Interview. It should take less than 24 hours, but if it takes longer than that, contact an Academy Member (has a little hat Icon and [Academy] next to their name).
They should be able to sort it, or get someone else to sort it.
Once you are whitelisted, don't forget to change your name to CSO <name> so CSO Payzard, don't forget you can only patrol with SPC+. Safe patrolling.