All types of operations require a permit, and the CAA has made it easy to fax a form. Use the after-hours fax for night and weekends. Typically, the CAA wants 24 hours notice, and if you’re landing at one of their “Special Permission” Airports, you’ll want to make proper advance notification, along with the permit to ensure customs and services are available.
Special Permission Airports: FYGB, FYKM, FYKT, FYLZ, FYOA, FYOG and FYRU.