All new curbing installed within the City right of way shall be installed as follows:
(a) For concrete streets, integral concrete curbs and gutters shall be provided.
(b) For asphalt streets, thirty-inch concrete curbs and gutters with six-inch vertical curb in accordance with ODOT BP.-7 type 2, shall be provided, unless otherwise authorized by the City Engineer in writing.
(1979 Code 97.41)