Any nonconforming use or structure legally existing at the time of the adoption of this chapter may be continued, altered, reconstructed, changed, sold, or maintained even though it does not conform to the regulations of the district in which it is located, as provided below. It is the intent of this chapter to permit these nonconformities to continue until they are removed. The Codes Enforcement Officer may identify and register the nonconforming uses and structures existing as of the effective date of this chapter, in order to determine the right to continue said use.