law: The Motor Vehicles Act, 1988
  87. Temporary permits.
  
  Provided that  a Regional 
  
  Transport Authority or, as the case may be, State  Transport Authority  may, in  
  
  the case  of goods carriages, under the  circumstances of  an exceptional 
  
  nature, and for reasons to be recorded  in writing,  grant a  permit for  a 
  
  period exceeding four months, but not exceeding one year.
  Provided that  the number  
  
  of transport  vehicles in  respect  of which temporary  permits are so granted 
  
  shall not exceed the number of vehicles in  respect of  which the  issue of  
  
  the  permits  have  been restrained or, as the case may be, the permit has been 
  
  suspended.