Regional Transport officials have mentioned that new two wheeler will be registered only if the owner brings his new ISI-certified helmet with the bill from 1st July. Madras High Court has passed orders on Monday stating that wearing of helmets by two-wheeler riders will become compulsory on July 1, and bikes of those violating the rule would be impounded by authorities immediately. Their driving licence will be seized, and they will be returned to the riders only on production of an ISI-certified helmet with purchase receipt.