Hello Golfman25, Thank you for your reply.
In my case, the two buildings are in the same address. So it can't be argued they are at two different locations. Also they belong to the same company with a single company legal registration. So it can't be argued either that they are in two different legal entities.
In my understanding, I consider opinion 3 the most risky option to take. Assuming if the building no.1 were pure automotive (no mixing with nonautomotive), then 5.2h approval by the oversight would clearly be required to separate building no. 1 and building no. 2. It would be very funny when building no.1 is a mixed auto/non-auto, then we can completely ignore to get 5.2h approval to separate building no.2.
I think the consequence if a witness auditor finds out we did not have any approved waiver and considers the case as unapproved site separation would be very disastrous.
I think you're over complicating it. They can only audit automotive processes. You have one applicable automotive process -- pressing. That consists of a single production location with 150 employees. Your other process is casting, which isn't applicable to automotive. There is no logical reason to include that head count in an audit as they will not be dealing with it. Somebody at your CB should have enough sense to make the call and move forward.