For purposes of this subchapter and Subchapter D, the determination as to whether employees, services, or employment are the same or similar must include consideration of:

1. (1) the training and experience of the employees;
2. (2) the nature of the work; and
3. (3) the number of hours normally worked.

Acts 1993, 73rd Leg., ch. 269, Sec. 1, eff. Sept. 1, 1993.