Have To (Obligations), Wear the school uniform every day., Complete homework assignments after classes., Don't Have To (Lack of Obligations), Bring your own laptop; the school provides them., Be skilled artists to participate in the art club., Must (Strong Obligations), Be respectful to teachers and classmates., All members of the science club attend the upcoming science fair., Must Not (Prohibitions), Use mobile phones during class hours., Bring food or drinks into the library..

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