24Where a communication or signalling system uses radio frequencies for transmitting signals, an employer shall ensure, and each employee who uses the communication or signalling system shall ensure, that the system is used only if precautions have been taken against
Communication or signalling system using radio frequencies
setting off any electric blasting caps,
the inadvertent operation of any other blasting device that may respond to the radio frequencies or the radiated energy, and
the inadvertent overriding of the remote control of any unit of mobile equipment.