They have been allowed to be impleaded in the matter in which the panel is examining the issue of damage to the flood plains of the river allegedly caused due to the holding of cultural extravaganza by Sri Sri Ravi Shankar's Art of Living (AOL) in March this year.
The application came before bench headed by NGT Chairman Swatanter Kumar which listed the issue for August 10.
The plea moved by Prajanya Chowdhry, Anil Kapoor and Anand Mathur said that the concept that festivals and other religious and cultural gatherings on the plains of the rivers were polluting the water bodies is baseless.
Advocate Anirudh Sharma, who appeared for them, said that Constitution of India allows individuals to hold events like World Culture Festival and participate and any restriction would deny such rights to them.
"Direct the state respondents to ensure that the religious and cultural gatherings on the banks of rivers, if any, be conducted in the most eco-friendly manner," the plea said.
The petitioners have contended that injunction against events like World Cultural Festival, Chhath Puja or the Kumbh has to be based on a detailed social impact assessment and also a religious cultural and anthropological assessment.