Registrants must:(1) be guided by the principle that property taxation should be fair and uniform, and apply all laws, rules, methods, and procedures, in a uniform manner, to all taxpayers;(2) not accept or solicit any gift, favor, or service that might reasonably tend to influence the registrant in the discharge of official duties, with the following exceptions:(A) the benefit is used solely to defray the expenses that accrue in the performance of duties or activities in connection with the office which are nonreimbursable by the state or political subdivision;(B) a political contribution as defined by