Will 391.43(a) put my truck out of service?
No. Across our inspection database, 391.43(a) citations have never resulted in an out-of-service order. The OOS rate for this violation is 0.0%—meaning it is not an OOS-eligible offense. You will be cited, but your truck will not be removed from service on the roadside. However, you must still address the underlying medical certification issue with your employer and state licensing authority.