(A) The city may, in lieu of on-site detention facilities, accept the furnishing of off-site facilities which, when added to on-site detention facilities, shall provide sufficient storage capacity to provide the storm water detention required to meet this regulation. Until such time as the permanent off-site storm water detention facilities are available, temporary on-site detention shall be provided.
(B) An acceptable legal contract between the developer and the off-site land owner shall be approved by the City Council.