Most boards will look at the applicant's financials, judging whether he has the ability to pay the sublet rent to the shareholder who will continue to be responsible for maintenance payments to the cooperative. As part of the due diligence process, the board should have the managing agent contact the applicant's present landlord or the landlord's building manger to see what kind of tenant he is. Boards may also opt for a Renters Reference report, which includes speaking to past neighbors, as well as the standard credit check. Written authority from the sublet applicant is required for these background checks. The Board should be flexible enough to meet the tenants' needs.
Human beings are complicated and creative.
There are only so many rules to control people's conduct.