The Canadian Standards Association CSA B335-04 Safety Standard for Lift Trucks does not require a removable key ignition switch.

"4.9.11 Shutdown Procedures, (e) The engine shall be stopped or the controls shall be turned off and the key removed."

The use of the word "or" only requires at a legal minimum that the engine is stopped. Removal of a key is a recommended safe practice where a removable key is involved. It is not legally enforceable if the engine is off.

The CSA Safety Standards are advisory consensus standards developed by the Canadian Standards Association. This is a private, non-governmental association that produces a wide variety of recommended safety practices. These safety standards and any revisions or updates are not automatically enforced by the Canadian federal, provincial or territorial governments. The standards become legally enforceable only if they have been adopted by a governmental body through the legislative process (adopted by reference).

To my knowledge, the Province of Prince Edward Island and the Yukon Territory are the only Canadian governmental bodies that have adopted by reference CSA B335-04, Safety Standard for Lift Trucks. The older CSA B335-94, Industrial Lift Truck Operator Training is the standard that has been adopted by the majority (not all) of the remaining Canadian governmental OHS agencies.

Governmental bodies that have not adopted by reference a CSA Safety Standard often refer to a CSA Safety Standard as a recommended (non enforceable) safe practice. The Ontario Ministry of Labour has issued such a guideline. Google: "Guideline for the Safe Operation and Maintenance of Powered Lift Trucks." In the Part 3, Safety Program, Training portion of this document the Ontario Ministry of Labour makes the following referral: "The Canadian Standards Association also has a training standard (Industrial Lift Truck Operator Training B335-94), which may be useful in designing or evaluating training programs." This document was issued in 1999 and the referral has not been updated to the CSA B335-04 Safety Standard for Lift Trucks.