Economy Unlock 4: Govt allows more activities outside containment zones; no local lockdowns without Centre's consultation Updated : August 29, 2020 09:27 PM IST Open air theatres will be permitted to open with effect from 21st September 2020. The central government allowed metro rail services to operate in a graded manner from September 7 under the new guidelines on Unlock 4. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.