Failure on the part of grantee to comply in any substantial respect with any of the provisions of this franchise shall be grounds for forfeiture thereof, but no such forfeiture shall take effect if the reasonableness or the propriety thereof is protested by grantee until and unless a court of competent jurisdiction (with right of appeal in either party) shall have found that said grantee has failed to comply in a substantial respect with any of the provisions of this franchise, and grantee shall have six (6) months after the final determination of said question to make good the default before a forfeiture shall result, with the right in the city council, at its discretion, to grant such additional time to the grantee for compliance, as necessities in the case may require. (1983 Code § 13.02.100)