1123.05 DISCONTINUANCE.
   A nonconforming use which has been discontinued or abandoned shall not thereafter be returned to a nonconforming use. A nonconforming use shall be considered abandoned whenever either of the following conditions exist:
   (a)   When the use has been voluntarily discontinued for a period of two (2) years.
   (b)   When the nonconforming use has been replaced by a conforming use.