The legislatures MUST vote against this.
This must be voted down regardless of the actual contents.
If this is passed then the various legislatures are voting for themselves to be reduced to rubber stamps passing whatever is put in front of them.
This isn't in any doubt whatever - it is entirely blatant. The treaty has been drafted in total secrecy by only the parties that benefit from it, and presented as "Here it is, you may not change it in any way, just sign it".
Whatever the text of the treaty, the drafting process is entirely illegitimate.
The only possible response is to vote it down on the spot, and make clear that this process is not acceptable and any future attempt will similarly be dismissed out of hand.
Don't debate it, don't try to justify it, just kill it.