Where the provisions of this Zoning Code impose a greater restriction than that imposed by a private agreement, including but not limited to any easement, covenant, or deed restriction, the provisions of this Zoning Code will control. Where the provisions of a private agreement impose a greater restriction than this Zoning Code, the provisions of the private agreement may be enforced between private parties notwithstanding the provisions of this Zoning Code. The existence of a private agreement shall not excuse any failure to comply with this Zoning Code. The City shall not be responsible for monitoring or enforcing private agreements.