8.1 RIGHT TO REFUSE CARRIAGE
{...}We may also refuse to carry you or your Baggage if one or more of the following have occurred or we reasonably believe may occur:
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8.1.3 your mental or physical state, including your impairment from alcohol or drugs, presents a safety or health hazard or risk to yourself, to passengers, to crew, or to property or may materially affect the comfort of other Passengers or crew
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8.1.4 you have committed misconduct on a previous flight, and such conduct may be repeated
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8.1.10 you fail to observe our instructions with respect to safety or security