Have you read the NHTSA letter? They talk about prohibiting interstate commerce if the product doesn't meet safety standards.
Instead of nitpicking, let's focus on the actual issue. The NHTSA didn't order Hotz to shut it down, it merely asked about the safety of the product, which led to Hotz shutting it down himself.
Instead of nitpicking, let's focus on the actual issue. The NHTSA didn't order Hotz to shut it down, it merely asked about the safety of the product, which led to Hotz shutting it down himself.