PART VIObscuration of lights and camouflage.
49Provisions as to practice of dimming lights.
1
Nothing in any enactment requiring a local authority to cause the whole or any part of their area to be lighted shall render it unlawful for the authority to cause the lights in highways and public places in the whole or any part of their area to be dimmed or extinguished for the purpose of—
a
training or exercising any persons in respect of air-raid precautions; or
b
testing devices for enabling movement of traffic to continue in unlighted streets.
2
Nothing in any enactment or in any order or regulation made under any enactment relating to lighting of factory premises, mines, or public utility undertakings shall render it unlawful for the occupier of any factory premises, the owner of any mine, or the persons carrying on any public utility undertaking to cause the lights in the factory premises, mine, or undertaking to be dimmed or extinguished for the purpose of—
a
assisting a local authority in training or exercising any persons in respect of air-raid precautions; or
b
training or exercising persons employed in the factory premises, mine, or public utility undertaking in respect of air-raid precautions.
3
This section shall be deemed to have had effect as from the commencement of the Act of 1937.