NHTSA extended Tesla's deadline to respond to an FSD investigation covering 8,313 potential traffic violations. The new February 23 deadline arrives just after Musk announced FSD will become subscription-only on February 14, the same day California's DMV gave Tesla to fix misleading marketing or face a sales ban. We break down what federal regulators are actually investigating, why Tesla is juggling three major probes simultaneously, and how the subscription pivot may be a legal hedge as regulators close in.