Sec. 7. (a) Except as provided in section 15 of this chapter, this chapter does not apply to an employer with a population of less than seven thousand (7,000).
(b) This chapter does not apply to an employer that has adopted by:
(1) ordinance;
(2) resolution;
(3) amendment; or
(4) executive order;
provisions and procedures that permit an employee to form, join, or assist an employee organization to bargain collectively.
(c) For:
(1) a collective bargaining agreement; or
(2) a memorandum of understanding;
entered into between an employer and an employee organization or a recognized representative before January 1, 2008, this chapter may not be construed to annul, modify, or limit the agreement or memorandum during the term of the agreement or memorandum.