prescribed in WordNet English dictionary

1. fixed or established especially by order or command
   "at the time appointed (or the appointed time")
   appointed  decreed  ordained  prescribed 
   
2. conforming to set usage, procedure, or discipline
   "in prescribed order"
   official  prescribed 
   
3. formally laid down or imposed
   "positive laws"
   positive  prescribed 
   
4. set down as a rule or guide
   prescribed