To occupy and utilize any newly constructed structure or to modify the use or occupancy of an existing building or portion thereof, a Certificate of Construction Completion Occupancy (CCC) is necessary. Before a CCC may be given, all work must be permitted. Permission can be granted at any time before the certificate is issued. The purpose of a CCC is to show that a building has been inspected for safety compliance with local laws and regulations. The CCC is issued by a certified building inspector who checks to make sure that the construction meets all requirements for occupancy as listed in the building code. If problems are found, they will be noted on the CCC and the owner will be notified either orally or in writing about the findings. Any necessary repairs or modifications required by these issues will be noted on the CCC and signed off by the building inspector. For example, if there are major problems with electrical wiring, it would be noted on the CCC and you would not be able to move into the house until those problems were fixed. In addition to checking for safety issues, a CCC is also needed before you can legally rent out rooms in a house. Without a CCC, illegal apartment buildings with more than three units could be built without any government oversight. These apartments would be very dangerous for their tenants because there would be no way to know if they were being maintained properly or not.