Ravichandran Ashwin can join the Indian side and bowl in accordance with cricket regulations. He left for Rajkot due to a family medical emergency, and the umpires have allowed his return, departing from the conventional rules outlined in the MCC rules.source https://timesofindia.indiatimes.com/sports/cricket/england-in-india/ravichandran-ashwin-can-come-anytime-and-bowl-straightaway-says-dinesh-karthik/articleshow/107776673.cms