What is the correct meaning of 'must' in legal terms?

In legal terms, the word 'must' denotes a requirement or obligation. When a statute, regulation, or legal document uses 'must,' it indicates that compliance is mandatory, leaving no room for discretion. This is in contrast to terms like 'may,' which suggest permission or optionality. In legal contexts, the use of 'must' clarifies expectations and enforces compliance, making it essential for understanding the obligations defined by laws or regulations. This distinction helps ensure that individuals and entities are aware of their compulsory duties under the law. Other terms, such as 'optional,' 'preferred,' and 'ambiguous,' do not convey the same level of necessity, focusing instead on choice or lack of clarity, which is why they do not accurately capture the meaning of 'must' in this context.