My brother-in-law was stationed at an american military base in Germany. The house had both German 240v and American 120v outlets, There was a 15kva or so transformer in the utility room.
Now this is a bit different because these houses are temporary assignments for American families. So a 120v secondary system is almost essential. Of course that 120v was still at 50hz so no old electric motor based clocks :roll:.
I would think that would be the best idea. In the event you has an appliance where you had little choice you would be covered,
What code? Doubt SL has a lot of code that can't be fixed with $50 US. Just guessing.
There are areas whee plans drawn on the back of currency are more widely accepted than engineered drawings.. eve in the US