Instructions and blank Form C. These instructions apply to a Right of First Refusal (Form C) for the sale of a five (5) or more residential rental unit housing accommodation. The Right of First Refusal (Form C) notifies the registered tenant organization after the owner has accepted (ratified) a third party sale contract for the housing accommodation. This Right of First Refusal (Form C) is used only when the owner has issued an Offer of Sale Without a Third Party Sale Contract (Form B) and the tenants formed a tenant organization and filed a tenant organization registration application.