The medulla oblongata is the lower portion of the brainstem. It deals with autonomic functions. The cardiac center is the part of the medulla oblongata responsible for controlling the heart rate.
HazMat Endorsement Requirements. Below is what you can expect when applying for a Class H endorsement: You must have a valid commercial drivers license (CDL) for the state in which youâre applying. It must be valid (not currently suspended or revoked) and not checkered with serious road violations.
In addition to the normal requirements for a CDL, you will need a background records check before a hazardous materials endorsement (HME) can be issued.nly commercial drivers transporting hazardous materials are required to undergo a background record check. These requirements do not apply to drivers or applicants for a CDL that do not apply for a hazardous materials endorsement (HME).