GST number in GSTR1

sachin parikh (125 Points)

26 November 2017  
My client provides building of roads services to the Panchayat and local govt. authority. That govt. body only issues orders for building roads to my client. That body does not have GST number.
Now while filing GSTR1 on portal it is asking for GST number for GOVT. body.
My question is are Govt. body exempted from GST? If so what to do with GSTR1. If not then do we need to ask that Govt. body to get registered for GST?
PLEASE GUIDE.