I have called 311 with a couple of code enforcement/zoning questions, and they have always been able to put me in touch with someone who could answer my question. 

Short answer is as little as possible.The long answer is it depends on the deal.Typically you end up in a subject 2 situation when the current owner has little or no equity in the property, the current advantage of subject 2 properties is that most mortgages are below current market rates.Keep in mind when acquiring a property subject 2, in most instances you are not notifying the current lender of the change in ownership, and most if not all mortgages have a due on sale clause, which is the lender's decision if they want to enforce it or not.I personally like the idea its a great way to get investment properties with low rate loans, that with most likely appreciate in the coming years.

If they are VERY professional, they will have their processes in writing as verification that policies are enforced equally and fairly by their entire staff.6.

Buyer warrants and covenants not to take any enforcement action against any Obligor that would be commercially unreasonable or create any liability for Seller.

If they are VERY professional, they will have their processes in writing as verification that policies are enforced equally and fairly by their entire staff.6.

If your lease says they can't add a pet or move in a family of four without your permission, you need to know how to enforce that.

Child support enforcement!  

It's a real pain to enforce but it's worth it.The majority of carriers right now have a loss rule on new business that varies but goes something like this... they will not accept your new policy if you have a loss in the last 3 or 5 years.

**Exit Strategy**: Make sure you have a solid plan to refinance or sell the property before the loan term ends or in case the lender enforces the due-on-sale clause.Being diligent with these aspects will help avoid potential pitfalls in your first Subject To deal.

Whether your clause will be enforceable is another matter.