law: Indian Wireless Telegraphy Act, 1933
  2. Definitions 
  In this Act, unless there is anything repugnant in the subject
  
  or context- 
  (1) "wireless communication" means any transmission,
  
  emission or reception of signs, signals, writing, images and sounds, or
  
  intelligence of any nature by means of electricity, magnetism, or radio waves
  
  or Hertzian waves, without the use of wires or other
  
  continuous electrical conductors between the transmitting and the receiving
  
  apparatus.
  Explanation: " Radio waves" or
  
  " Hertzian waves" means electromagnetic
  
  waves of frequencies lower than 3,000 gigacycles per
  
  second propagated in space without artificial guide;
  (2) "wireless telegraphy apparatus" means any
  
  apparatus, appliance, instrument or material used or capable of use in wireless
  
  communication, and includes any article determined by rule made under section
  
  10 to be wireless telegraphy apparatus, but does not include any such
  
  apparatus, appliance, instrument or material commonly used for other electrical
  
  purposes, unless it has been specially designed or adapted for wireless
  
  communication or forms part of some apparatus, appliance, instrument or
  
  material specially so designed or adapted, nor any article determined by rule
  
  made under section 10 not to be wireless telegraphy apparatus;
  (2A) "wireless transmitter" means any apparatus,
  
  appliance, instrument or material used or capable of use for transmission or
  
  emission of wireless communication;
  (3) "prescribed" means prescribed by rules made under
  
  section 10.