The difference here is that the bill, as it reads now, protects the employees and people hired by first nation governing bodies.
The amendment would also add protection for first nation governing bodies themselves. The way it's worded, it does refer to “employees”, but that's because there is vicarious liability when you have negligence. The idea is that if employees are sued, there would be no liability for the first nation governing body because of the acts of those employees, and also no personal responsibility on the part of the employees themselves.