Paragraph 12 Cattle crossingsI1

Each light signal forming part of the sign for warning of cattle crossing provided for at item 25 of the Part 2 sign table and shown in the upper part of the diagram at that item must, when in operation, show an intermittent amber light at a rate of flashing of not less than 60 nor more than 90 flashes per minute with the sign operating such that one light is always shown when the other light is not shown.