Indiana Code Title 36. Local Government § 36-7-11.3-23

Sec. 23. (a) Whenever notice is required to be given under this chapter with respect to a matter coming or pending before a commission created under this chapter, the notice shall be sent to the persons designated as interested parties under this chapter.

(b) A public officer or office entitled to receive notice may designate in writing filed with the commission alternate or additional persons to whom notice required to be served upon the officer or office shall also be served.  The commission shall maintain a complete list of the persons and their addresses.

(c) A person, an official, or an office who or that is not served notice in the manner prescribed by this chapter is not considered properly notified unless the person has waived notice in writing.