Need government order on construction on Ganga riverbank

Hello,

I am doing some research on the rules for construction on the Ganga river. I am looking for a copy of the government orders that state that in all the towns situated along the Ganga river, no development activities can take place 200 metres from the riverbank. In case you have a PDF copy of any of the orders, I would greatly appreciate if you can share a copy with me. 

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