In exceptional cases where it is difficult or impossible to comply with the strict letter of this chapter, any person, firm or corporation shall have the option to apply for an exemption from any provision of this chapter to the city manager or designee. The city manager or designee shall exercise those powers in such a way that the public welfare is secured. If an appeal has been initiated, the billing process will stay until such appeal has become resolved. Appeal applications must be submitted within ninety (90) days after the billing date. (Prior code § 4519)