Gst tds

We are local authority. We already have GSTIN for renting of immovable property. We regularly collect and pay GST on renting of immovable property service and had also filed GSTR-3B and GSTR-1 for each month. My question is -

1. Is there any separate registration for TDS is required to be obtained?

2. Threshold limit of Rs.250000/- is to be checked for each Work order or it is cumulative limit for a year as like TDS in Income Tax?

Thanks in advance for your valuable time.