Indemnification for sign installation and maintenance. All persons engaged in the business of installing or maintaining signs which involved in whole or in part, the erection, alteration, relocation, maintenance of a sign or other sign work, in, over, or immediately adjacent to a public right-of-way or public property used or encroached upon by the sign contractor, shall agree to hold harmless and indemnify the Village of New Auburn, its officers, agents, employees, from any and all claims of negligence resulting from the erection, alteration, relocation, maintenance of this sign or any other sign work insofar as this chapter has not specifically directed the placement of this sign.