A regulation prevents persons with a drug arrest and conviction and/or those undergoing current treatment for drug abuse from working in certain state run facilities for the safety of the general public. One employee of the department of treasury brought an action claiming a denial of equal protection and due process by taking away his right to a job. It is claimed that the prohibition is necessary to protect the public from potential problems that could arise. Which test of constitutional validity would be likely applied to this regulation? Explain.