1. Set out the specific requirements for conducting a legal "drug-free workplace" policy specifically on random drug testing. For each specific requirement in your policy, provide short justification for inclusion in the policy [i.e. notice requirements, who is to be tested, now often, consequences for refusing to take a random drug test etc.].
2. Next provide a general "drug-free workplace" testing plan. Some things to consider for your memo are what specific subjects should be included in the policy memo, except random drug testing which you will discuss in 1. above [i.e. pre-employment testing, scope of testing, list of drugs to be tested for, employee retest request, consequences for violating drug policy, reasonable suspicion, what should occur if employee tests positive, etc. This is not an all-inclusive list of subjects to be considered in your general workplace drug testing policy memo.]

Here are additional links for you to reference.

Drug Testing at Work

https://www.findlaw.com/employment/workplace-privacy/drug-testing-at-work.html

Laws on Employee Drug Testing

https://www.nolo.com/legal-encyclopedia/free-books/employee-rights-book/chapter5-3.html