building at 100 Newel Street

The listing agent for the one in contract told me that it was no longer part of HDFC. Is it possible that a coop can ignore the rules for so long that HPD loses track and doesn't enforce the guidelines? To my knowledge NO HDFC coop has successfully petitioned to get out of the program.

In general it is left up to the Coop to enforce the rules and to my knowledge HDFC doesn't go around checking so there are more than a few Coops which not only ignore the rules, but don't collect or pass on the substantial flip tax.

100 Newel is not an HDFC; they have no income cap, and little or no flip tax.