Final answer:
Legal concerns with substance testing include Fourth Amendment rights and disparities in marijuana laws between states and federal law.
Step-by-step explanation:
When it comes to substance testing, there are several legal concerns to consider. One concern is the Fourth Amendment, which protects individuals from unreasonable searches and seizures. School officials conducting strip searches of students suspected of possessing or distributing drugs may violate students' Fourth Amendment rights.
Another concern is the differing laws regarding marijuana use between states and federal law. These differences can affect how a person is treated in court. To rectify these disparities in the application of the law across the nation, lawmakers could consider comprehensive federal legislation to address marijuana use.