Source? My source is this:That is not what NHTSA's statement said. NHTSA never actively called Tesla. It was Tesla that contacted NHTSA about a production change with the removal of radar and as a matter of policy, NHTSA does not give check marks for features they have not tested yet on cars with significant hardware changes.
You are right, it doesn't say who called who, but it also doesn't say Tesla called NHTSA. However, it was WEDNESDAY when Tesla "briefed" the NHTSA on the change, a day after the change was announced to the public. NHTSA was not told before anyone else. In my life in Aerospace, you call your regulator before you push out your press release because you plan ahead for changes that may impact how the regulator evaluates the safety of your product.