The official map and any additions thereto or modifications thereof shall be reviewed within five years from the date of adoption or readoption of the map by the governing body. The procedure by the local planning commission and the governing body in connection with the review shall conform to that prescribed as to original adoption of the map. Neither the official map nor any additions thereto or modifications thereof shall be of any force or effect for more than five years after adoption or readoption of the map unless readopted by the governing body.