I'm not sure all of those could go in. It could certainly be in the board policy and in the rules, and there could be a commitment from the chair. This is framework legislation for the general authority to do it and the requirement for a broad external hiring process. It would be difficult to put more detail than that into the regulations.
I would say for the immigration officers you're referring to, the public service hiring process is very difficult and very different. They were inherited a long time ago. They were transferred to the Department of Immigration. There isn't the same commitment or history.
This is an opportunity for a fresh start, and I really hope the board and the government will take it.