The permittee under this Article shall be responsible for all liability imposed by law for personal injury or property damage proximately caused, permitted and done by the permittee under his permit, or proximately caused by failing, on the permittee’s part, to perform his obligations under such permit or to properly maintain such improvement as provided in Section 32-54. If any claim of such liability is made against the City, its officers or employees, the permittee shall defend, indemnify and hold them harmless from such claim insofar as permitted by law.