90. Restriction on unauthorized persons.-(1) A factory licensed under these rules for manufacture of explosives shall be surrounded by a wall or barbed wire fencing at least 2 metres high of such strength and construction as to effectively prevent entry of unauthorized persons. (2) The area enclosed by such wall or fence shall cover the safety zone required to be kept clear from any of the process buildings or sheds. (3) The licensee shall at his own expense provide for safe custody of the factory a guard which shall be of such strength as the District Authority may consider to be sufficient.
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