Final answer:
The law must provide clear and specific language, or it may be considered vague, leading to a 'chilling effect' on behavior and making the law potentially unenforceable and unconstitutional.
Step-by-step explanation:
If the law must provide clear and specific language to define a prohibited behavior and they do NOT, then they might be considered vague. A vague law is one that does not clearly define its terms or requirements, making it difficult for individuals to understand what behavior is prohibited. This lack of clarity can lead to a 'chilling effect,' where people restrict their behavior more than the law intends out of fear of violating it. When a law is too vague, it can be challenged and potentially declared unconstitutional because it fails to provide the proper notice to citizens that is required for them to regulate their conduct accordingly.
Laws that are overly broad or unclear may result in people refraining from free speech or expression due to uncertainty about what may be considered illegal. This could potentially lead to a disproportionate limitation on expression, going beyond what the law originally intended. Thus, the constitutionality of laws is of utmost importance to ensure that they do not become unenforceable due to their vagueness or ambiguity.