For whatever it's worth, the "poor relief" to "township assistance" terminology change was enacted pursuant to HEA 1972-2003 passed back in 2003.

The enacting section:
SECTION 10. [EFFECTIVE JULY 1, 2003] (a) Beginning July 1, 2003, any reference in the Indiana Code to poor relief (as administered by a township under IC 12-20) shall be treated as a reference to township assistance.
(b) The legislative services agency shall prepare legislation for introduction in the 2004 session of the general assembly to organize and correct statutes by changing any reference to the township poor relief program in the Indiana Code from "poor relief" to "township assistance".
(c) If during the preparation of legislation under subsection (b) the legislative services agency cannot determine whether a particular instance of the term "poor relief" refers to the township program administered under IC 12-20, the legislative services agency may omit changing that reference in the legislation.
(d) This SECTION expires June 30, 2007.