"A case was registered against Divakar Borkar (75), manager of Sena Bhavan, who had sought permission from the police for organising the rally, under the relevant sections of the Noise Pollution (Regulation and Control) Rules, 2000 for violation of sound norms," Pravin Salunkhe, Additional Police Commissioner, told PTI.
The rally was held on October 24 at Shivaji Park in Dadar, where ailing Shiv Sena supremo Bal Thackeray addressed the gathering through his recorded message that was screened.
Besides the party chief, several others had also delivered speeches during which the sound decibel levels remained between 65 to 105, police said.
While granting permission for the rally at the ground that has been declared as a silence zone in 2010, the Bombay High Court directed Sena to adhere to sound pollution norms and maintain decibel level below 60 and also ensure that cricket pitches in the ground were not damaged during the rally, police said.
Borkar has not been arrested yet, police said adding that it was a non-bailable offence.
Shiv Sena has been holding the rally at Shivaji Park since over 40 years.
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The court had also imposed certain conditions, directing the party to use distributive sound system, instead of loud speakers and also put up sound barriers around the ground.
"The party did use distributive sound systems and also put up sound barriers, but still the sound levels crossed the permissible limits," the officer said.
The party had approached the high court after the city's civic body refused to grant permission stating Shivaji Park had been declared a silence zone.