It's a fundamental principle of co-ops that House Rules are subject to change at any time, and the Proprietary Lease may be amended by a supermajority vote of the shareholders. Everyone who buys into a co-op agrees to these terms as a condition of purchase. Policies change -- sometimes for the worse -- but as long as these policies are administered even-handedly, shareholders are bound to obey them.
Great way to explain it. Thank you.