A temporary CO is valid for up to 180 days and can be used while a permanent CO is being processed. There are three different types of COs: temporary, preliminary, and final. A certificate of occupancy (CO) is a document that states that a property has been constructed or altered in accordance with the applicable building codes and is safe for use. If you are a business owner, it is important to understand the different types of emergency lighting certificates that are available. Landlord (Tenant) Recommendation LetterĮmergency Lighting Certificate Form PDF Details.
