On February 27, 2013, Indiana submitted a State Plan for implementing the emission guidelines for Sewage Sludge Incinerators (SSI). The enforceable mechanism for this State Plan is a State rule codified in 326 Indiana Administrative Code (IAC) 11-10. The rule was adopted on August 1, 2012, and became effective on November 1, 2012. [78 FR 34920, June 11, 2013]