BBL deals mainly with the MILF, and their associated Ethnic tribes. Now, does the referendum in FAB/CAB give voice to other tribes? NO.
In the issue of ancestral domain, indigenous groups usually claim wide coverage. If the construction of an economic zone is assessed to be beneficial (utilitarian) despite encroaching part of their land, a compromise has to be met that is beneficial to other tribes and the government. Not only with the MILF and it's subordinates. This includes (e.g. securing jobs/certain commercial spaces for them, etc).
"The FAB recognizes that there are different peoples and identities in Mindanao and in the Bangsamoro. The FAB also recognizes rights already recognized in laws and other legal documents"
My question, how 100% sure are we that these extremists will adhere? They gave our guns back,but took spare parts off the weapons rendering it useless. The US tracked phonecalls and IP address from Marwan indicating he's using the MILF network. At first, they lied that they never supported Marwan, they lied that they never fired the first shot, and called it a misfire. They lied that they never took the weapons. They lied about the mutilation of SAF bodies. Now this idiotic country is giving them 1/3 of the economy.