# Level Crossing (Antrim) Order (Northern Ireland) 2000, Paragraph 7


Visual indicators and an audible alarm shall be provided at the control point. The indicators shall show when—
(a) the main power supply is available;
(b) all the barriers are fully raised;
(c) all the barriers are fully lowered;
(d) at least one of the intermittent red lights in each of the traffic light signals on each side of the railway is showing along the carriageway.

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Source: https://www.legislation.gov.uk/nisr/2000/305/schedule/2/paragraph/7 (the official version)
Page: https://openlegislation.uk/level-crossing-antrim-order-northern-ireland-2000/schedule-2/paragraph-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.