What's the deal on waivers?

So, what would Secretary Duncan want from states in return for waivers on the NCLB hardline? EdWeek has some (not yet set in stone) details:

Here's what is under discussion, according to sources:
• There would be three kinds waivers under No Child Left Behind, and states would have to sign up for all of them—it wouldn't be an either/or thing. This is something Duncan made clear in the initial waiver announcement.
• To waive the 2014 deadline for all students to be proficient in math and language arts, states would have to adopt college- and career-readiness standards and assessments. It's not clear yet what that would mean. But, presumably, Common Core would be involved. Student growth could be used to measure achievement.
• To essentially freeze in place the law's system of sanctions, states would have to propose their own differentiated accountability systems that would incorporate growth and establish new performance targets. States also would have to establish differentiated school improvement systems that more accurately meet the needs of schools with different challenges. The accountability systems would not have to include choice or free tutoring. Districts also no longer would have to set aside Title I money for such programs.
• To waive the law's highly qualified teacher requirement and get funding flexibility, states would have to adopt evaluation systems for teachers and principals that are based on growth and make sure districts actually do what they say they're going to do.
Apparently, the four models under the current School Improvement Grant program are the most significant sticking point in discussions of what the waivers should look like.

Not a surprise on that last bit.