What is "unless posted otherwise?

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"Unless posted otherwise" is a phrase commonly used in signage and notices to indicate that a certain rule or regulation is in place, unless there is a specific exception or change that has been posted or communicated. For example, a sign reading "No Parking - Unless Posted Otherwise" would mean that parking is not allowed in that area, unless there is a sign or notice stating otherwise. This phrase is often used to convey flexibility or exceptions to a general rule, but it requires individuals to actively seek out and follow posted notices and changes.