You're still not reading the article clearly enough or maybe the author wasn't clear.  The 75% workforce units have to fit the income/asset/owner-occupant requirements to buyers in the first 60 days.  The 25% of units subsidizing the other units don't have those requirements at all.  The thing to remember is this is done with no Government funding.  Now if we rather pay $1,000 a month in more taxes every month to fund enough workforce housing, we can do that too.