Over the past few weeks, several organisations — from anti-reservation groups to those opposed to the special intensive revision (SIR) of voter rolls — have sought permission to hold demonstrations at Jantar Mantar. Their requests have been denied amid concerns over “open calls” for protests, uncertainty over crowd size and last-minute requests, said officers familiar with the process. No demonstration has been allowed at the venue since the stir led by the Cockroach Janta Party (CJP) in July, they said.