I think it means more or less what I said in my last reply. this is trying to point out that you cannot cobble together a bunch of approved parts and automatically get approved equipment.
The confusion results in that if I wire my house with a bunch of approved parts (boxes, wire, and devices) I get an approved product. (a House) but if I take an approved relay, limit switch, some push buttons, a power supply, etc i still need a product approval. In the case of a house, the inspection process is getting the approval and the inspector checks that each component is installed correctly and to code.
In the case of a control system the Approval agent from CSA, CUL, Warnoch Hearsey, etc. take a special code book or product standard and perform the required tests for that equipment type and environment. An electrical inspector will just look for the lable as very few inspectors have the instraments or technical data to evaluate stuff in the field.
Short answer I think you are going to need a special inspection for your control system. The manufacturer mau be able to do it in house or pay to do it in the field. Be sure when you order it that you will back charge for any field approvals if the gear arrives without a CSA, CUL, or other recognized approval lable. For our American friends Approved is synonimous with Listed.