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1. Unless otherwise provided, the boards and flags prescribed in these regulations shall be rectangular.
2. The colours of the boards, flags and pennants shall not be faded or dirty.
3. They shall be large enough to be easily visible; this condition shall be considered to be satisfied in all cases:
(a) For the boards and flags if neither the length nor the width is less than 1 m or, in the case of small craft, less than 0.60 m;
(b) For the pennants if the length is not less than 1 m and the breadth at the staff not less than 0.50 m.