1. Notwithstanding section 321E.8 , the department may issue annual permits for the operation of vehicles or combinations of vehicles transporting fluid milk products to or from a milk plant, receiving station, or transfer station, exceeding the weight limitation of section 321.463 but not exceeding a gross weight of ninety-six thousand pounds, on primary roads and primary road extensions in cities. 2. A vehicle or combination of vehicles for which a permit is issued under this section shall not exceed the maximum dimensions specified in sections 321.454 through 321.457 . 3. For purposes of this section , “fluid milk product” means as defined in 7 C.F.R. §1000.15 . 4. The department shall adopt rules pursuant to chapter 17A governing the issuance of permits under this section . 2021 Acts, ch 140, §3, 4 Referred to in §321.463 , 321E.14