Should, within the term of any permit, developments within the field for which the grant was made to the holder of the permit, present the opportunity to the holder of the permit to be more effective, efficient and economical through the use of a substance or material other than those for which the permit was originally made, the holder of the permit may petition the Public Works Department which, with such requirements or limitations as it deems necessary to protect public health, safety and welfare, may allow the use of such substances under the terms and conditions of the permit.
If state or federal standards and regulations are amended, the owners of the Small Wireless Facilities and/or wireless support structures governed by this chapter shall bring any facilities and/or structures into compliance with the revised standards and regulations within six months of the effective date of the standards and regulations, unless a different compliance schedule is mandated by the regulating agency. Failure to bring Small Wireless Facilities and/or wireless support structures into compliance with any revised standards and regulations shall constitute grounds for removal at the owner's expense.