Section 325A.7B - Agency tariffs1.Authorization. Sections 325A.2 and 325A.7 shall not be construed to prohibit the making of rates by two or more motor carriers of household goods. 2.Agency tariffs. The names of the several motor carriers that are parties to an agency tariff shall be specified in the tariff. Unless otherwise required by the department, the agency tariff may be filed by only one of the parties to the agency tariff, or by a tariff filing agent, under a power of attorney granted by each of the parties to the agency tariff not doing the filing and filed with the department on forms prescribed by the department.