GST TDS Impact on Sales Commission

1. Is it compulsory to take GST registration for Individual Brokers/Commission Agent irrespective of GST registration limit of 20/40L?
If compulsory and not registered liability is on agent or receiver?

2. Is RCM applicable for Commission Paid to unregistered individuals by registered entity?

3. TDS Rate for Indenting Agent/ Brokers/ Commission Agent (for wholesale clothing) 5% 194H?

4. TDS Limit of Rs.15000/- is applicable to Income Tax Audited Individuals or only for under 1cr non-audit?

5. Is TDS Limit of Rs.15000/- is applicable to non-audit Sec 44AD individuals? or can make payment in excess of Rs.15000/- upto what limit?