Part of these standardizations will incorporate standardizing higher education requirements and certifications, if not local labor laws about foreigners teaching in these lands.
Frankly, as highly nationalistic as I know Indonesians to be, I surprised they would enter into such an agreement.
That said, regional integration will lead to a need for a lingua franca between these nations. Historically speaking, it was a similar need that lead to the development of BHS Indonesia in the first place a couple hundred years ago as a trade language common to the peoples of the archipelago. In ASEAN, despite its familiarity in Malaysia, Brunei and even the Philippines, Indonesian won't be the common language of this new economic community.
It's going to be English.
So, going forward, do you think English education will gain even more importance not as just a means to communicate to the West, but as a common language amongst the ASEAN community of Thailand, Vietnam and others?