What type of conflict-handling style is being used by the various unions that form the industry coordinating committee?

It is called "Collaborating".

This is when you accomplice or match up with the other party to accomplish both of your objectives. This is the means by which you break free of the "win-lose" worldview and look for the "win-win." This can be compelling for complex situations where you have to locate a novel arrangement. This can likewise mean re-framing the test to make a greater space and space for everyone's thoughts. The drawback is that it requires a high-level of trust and achieving a goal can require a great deal of time and effort to get everyone on board.