A Bombay High Court order prohibits any work within 50 metres of mangroves, irrespective of the ownership of the land.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/officials-carry-out-preliminary-survey-look-crz-%E2%80%98violations%E2%80%99-army
[2] http://admin.indiaenvironmentportal.org.in/category/author/anjali-lukose
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-mumbai
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mumbai
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coastal-regulations
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mangroves
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/high-court
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ngo
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment