About this and this (the possibility that New York's principals would be disallowed from considering student test scores when evaluating whether teachers should receive tenure), the New York Times thinks:
It is an absurd ban that does a disservice to the state's millions of public school students. The State Legislature should remove this language from the budget.
Who's to blame?
Nobody in Albany would say who is behind this language. The driving force, however, is the powerful teachers' union that gives lots of money and time to state campaigns.