There is a state law from 2014 where municipalities cannot create new or amend previous laws regarding how long or short a homeowner can rent their property for. 

(Amended 1/93) http://www.realtor.org/MemPolWeb.nsf/pages/COde Having said that, you probably have the legal right to present directly to seller.

Most contracts will have a specific closing date agreed upon, which can also be amended with agreement between the buyer and seller.

The restrictions should be in the CC&R's or a recorded Amendment to the CC&R's.

If so, I might do well to amend those tax returns and take the depreciation and expenses of maintenance and utiilities.

I also like to make it a condition that the seller deliver a couple of days before closing an Estoppel Certificate from the tenant where the tenant confirms:  (a) true and accurate copy of the lease and all amendments thereto; (b) address/unit they are occupying; (c) statement that Landlord is not in default under the Lease: (d) statement that Tenant is not in default under the Lease; and (e) statement of monthly rent and remaining term.This protects the buyer in the event there has been a subsequent written or verbal amendment of the lease (that the seller does not disclose) and prevents the tenant from making statements to the buyer/new landlord that are different from the terms of the lease that was provided to the buyer from the seller.Vivian

But now he is staying so we decided to play the cat card, and told him that per his lease pets not allowed and if he would like to keep it we will need to amend his lease to include additional $100 pet rent plus collect additional security deposit.

Better to hire someone then to pay for someone to amend possible mistakes or missed strategies later! 

So with that said, you then would have to make sure your contracts are flawless AND you likely will be doing more work constantly checking in on Due Diligence periods, the wholesalers contracts, their amendments, keeping up with the closing company etc. 

The city of Woodstock has recently amended their by law that enables all the R1 zoning house to have 1 or 2 Additional residential units.