Rcm on legal service

If  legal  Firm  is  Firm  of  Advocates  , then  RCM  is applicable  and  GST  will be  paid by  Recipient  of taxable services , who is  Business  entity  and located  in  taxable  territory .  

Yes RCM is applicable . kindly refer Notification 13/2017 CT (R)

Not all legal services will be subject to RCM. Only representational services before any court, tribunal or authority is subject to RCM.

OK, thank you sir

Kindly note I would like to correct my earlier view expressed. RCM is applicable in your case.
The department as corrected by Corrigendum GSR 1199(E), dated 25-9-2017 to NOTIFICATION NO. 13/2017-CENTRAL TAX (RATE), DATED 28-6-2017 and said the "Legal service" means any service provided in relation to advice, consultancy or assistance in any branch of law, in any manner and includes representational services before any court, tribunal or authority.
Further, as per section 24 persons who are required to pay tax under reverse charge are compulsory required to obtain registration irrespective of aggregate turnover in a financial year exceeds twenty lakh rupees or not.