An instrument rating allows the pilot to fly during Instrument weather conditions (IMC) in either a single engine aircraft category 3 or a multi-engine aircraft which is a category 1 instrument rating.
Basic requirements for admission include:
With an IFR rating you can exercise the privileges of your current licence in instrument meteorological conditions. You may also exercise the privileges of a VFR OTT rating.
The instrument rating is valid for 24 months. To renew the instrument rating you will need to take a flight test. The flight test can be completed in an approved flight simulator. The flight test is called an IPC. You cannot fail your IPC but you will have to prove to the examiner that you are competent to fly approaches.
If you let your instrument rating expire you will need to rewrite the INRAT and obtain a 70% or greater to pass.
CARs 401.05 (3)
In order to exercise the privileges of an instrument rating you will need to remain current. To remain current you will need: