New Delhi, May 27 -- The special intensive revision (SIR) of electoral rolls in Delhi will begin on June 30 with door-to-door verification by booth-level officers (BLO), the Delhi chief electoral officer (CEO) Ashok Kumar said on Wednesday.

CEO said that all district election officers have been asked to prepare for the SIR exercise and necessary arrangements for printing enumeration forms, stationery, and appointing BLOs and their supervisors have already been completed.

Helpdesks at district and assembly constituency levels to assist voters during the SIR has been set up, said CEO. Pre-SIR exercise is already underway.

"We have been able to map around 65 lakh [6.5 million] voters, with about 42% of the area covered. The pre-SIR exerci...