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Running dry and lowering of water level in docks. 
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56.—(1) Subject to having given notice in accordance with this section of their intention so to do, a harbour authority may at any time run dry or lower the water level in any dock under their control. 
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(2) Three clear days at least before a harbour authority run dry or lower the water level in any dock, they shall affix a notice of their intention so to do in a conspicuous place at each of the following places, that is to say, the principal office of the harbour authority and the harbour of the harbour authority. 
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