ECN Forum Forums General Topics of the Trade General Discussion Area Trouble with Intermatic T103 instructions

I am arguing with an installer about the T103 timer.
This thing is clearly in a NEMA 1 case (indoor only) but there is nothing in the instructions (sticker) or on the box that says so. In fact the box says
Parking lot lighting
Billboard lighting
Commercial lighting
Pools/Spas/Fountains
Electric Water Heaters
Outdoor Lighting

How can you enforce 110.3(B) when the label is wrong?