2012 International plumbing Code brings new acts, working on sewer,water, toilet,wc facility systems in commercial areas are responsible to make the work  safe manner to avoid diseases, of course they are important on agricultural areas.

Listed below are the code editions in effect as of January 1, 2012:

• International Building Code 2006 Edition
• International Fuel Gas Code 2006 Edition
• International Mechanical Code 2006 Edition
• International Plumbing Code 2006 Edition
• National Electrical Code 2011 Edition
• International Fire Code 2006 Edition
• International Energy Conservation Code 2009 Edition
• International Residential Code 2006 Edition

The Act requires local governments that elect to enforce these codes within their jurisdictions to adopt administrative procedures and penalties in order to locally enforce any of these mandatory codes. Also, any applicable appendices of these codes must be adopted locally in order to be enforceable within a specific local jurisdiction.

The Act also made the following optional codes available for local government adoption and enforcement. Local governments choosing to enforce any of the below optional codes must adopt the code(s) they wish to enforce, as well as administrative procedures and penalties.

• International Property Maintenance Code 2006 Edition
• International Existing Building Code 2006 Edition
• National Green Building Standard 2008 Edition

Behind those ;

Major codes used in the United States are

• NATIONAL PLUMBING CODE
  Building Officials and Code Administrators International (BOCA)
• UNIFORM PLUMBING CODE
  International Association of Plumbing and Mechanical Officials (IAPMO)
• INTERNATIONAL PLUMBING CODE (ICC)
  International Codes Council
• STANDARD PLUMBING CODE
  Southern Building Code Congress international (SBCCI)
• ONE AND TWO FAMILY DWELLING CODE
  Council of American Building Officials
• NATIONAL STANDARD PLUMBING CODE
  Plumbing, Heating, Cooling Contractors – National Association
• ANSI A40, SAFETY REQUIREMENTS FOR PLUMBING

The codes are adopted and altered by the local authorities to fit local needs.

Throughout the world different countries and jurisdictions have their local or common (as within EU) set of codes for different type of work. For the engineer it is always necessary to check and adapt the local regime.

You can check 2012 International Plumbing Code on wikipedia , wikipedia aricle is a uniform plumbing, if you interested in 2012 International Plumbing Code , http://www.constructionbook.com/2012-international-plumbing-codes/

The Georgia Amendments are can be found DCA State, check google for it.