The code of conduct goes on to suggest sarvajanik mandal office-bearers to have an agreement, if required, with the contractor who is supplying the music system.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ganpati-body-forms-code-conduct-bring-down-noise-pollution-during-festival
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-news-analysis-mumbai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/festival
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/religious-beliefs
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-security
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment