"School-based" options in new contract

As with most teachers in City Schools, I was excited to see the basic outline for the new contract that was just agreed between BTU and BCPS. Our school system is about to transform, it seems, away from tenure= more money, to a tenure-will-matter-a-bit-but-evaluations-will-actually-determine-opportunities-for-pay-increases. There are many more details that need to come out about the ways to move from 'standard' to 'professional' to 'model', although a basic outline of the contract (that has not been released to all as of yet) shows that advancing between those levels will be based on acquiring (12) AUs, or achievement units, based upon evaluations, college credit accrual (I believe...), and "other approved AUs".

This is exciting, but there was another change imbedded within this new contract. The idea of the "school based" option allowing teachers at a school to approve/deny pay increases for a longer work day/more planning time/etc. is very interesting. It seems, to which the article alludes, that schools are being given more autonomy and more specifically that we may see more "charter school" like implementations at City Schools. I wonder if this will open the door to individual schools becoming increasingly autonomous. What is there to stop other statutes from being approved/implemented outside of the realm of a teacher contract? I don't know how the decision-making process at North Avenue works for these processes, but I am interested to see where these options go.

I foresee changes at schools that draw teachers to different schools, perhaps homogenizing certain teacher personalities/qualities. Schools may implement certain teacher workday changes that attract various types of teachers. We already have some schools that have mostly veteran or, more commonly, mostly new teachers. I wonder if this will further change the teacher makeup at City Schools. Where might this lead?