Ind. Code § 36-4-3-23

Sec. 23. Notwithstanding sections 7, 12, 15.5, and 19 of this chapter, as those sections existed on December 31, 2009, an annexation or disannexation that took effect January 2, 2010, because of the application of section 7(b), 12(b), 15.5(d), or 19(f) of this chapter, as those sections existed on December 31, 2009, is instead considered to take effect January 1, 2010, without the adoption of an amended ordinance or the entry of an amended judgment or order under this chapter.