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Memorandwm Esboniadol
18. The control point shall have push-buttons to:
(a)lower the barriers – the ‘lower’ push-button;
(b)raise the barriers – the ‘raise’ push-button;
(c)release the protecting signals – the ‘crossing clear’ push-button;
(d)stop the lowering or raising of the barriers – the ‘stop’ push-button.