Final answer:
Preemployment medical examinations may be required after a job offer is extended. Rehabilitated and current users of illegal drugs are protected by the law. Accommodation is required unless it results in undue hardship.
Step-by-step explanation:
Under the Americans with Disabilities Act (ADA) of 1990, preemployment medical examinations may be required after a job offer is extended. Rehabilitated and current users of illegal drugs are protected by the law and cannot be excluded. Accommodation is required unless it results in undue hardship for the organization. Employers are not required to develop affirmative action plans for candidates with disabilities under the ADA.