321E.9  Single-trip permits.
  Subject to the discretion and judgment provided for in section 321E.1, single-trip permits, which may include a round trip to and from a job or delivery site, shall be issued in accordance with the following provisions:
  1.  Vehicles with indivisible loads having an overall width not to exceed forty feet, zero inches, an overall length not to exceed one hundred twenty feet, zero inches, or a total gross weight not to exceed one hundred thousand pounds may be moved, provided the gross weight on any one axle shall not exceed the maximum prescribed in section 321.463, pursuant to rules adopted pursuant to chapter 17A. The height of the vehicles and loads shall be limited only to height limitations of underpasses, bridges, power lines and other established height restrictions on the specified route.
  2.  Vehicles with indivisible loads exceeding the width, length, and total gross weight provided in subsection 1, may be moved in special or emergency situations, provided the permitting authority has reviewed the route and has approved the movement of the vehicle and load. The issuing authority may impose any special restrictions as deemed necessary on movements or exempt movements from the restrictions of section 321E.11 by permit under this subsection.
  3.  Cranes exceeding the maximum gross weight on any axle as prescribed in section 321.463 but not exceeding twenty-four thousand pounds may be moved in accordance with rules adopted pursuant to chapter 17A. Notwithstanding any other provision of law to the contrary, cranes exceeding the maximum gross weight on any axle as prescribed in section 321.463 and used in the construction of alternative energy facilities may be moved with approval from the permit issuing authority.
[C39, §5035.18; C46, 50, 54, 58, 62, 66, §321.469; C71, 73, 75, 77, 79, 81, §321E.9]
91 Acts, ch 133, §2; 94 Acts, ch 1087, §12; 96 Acts, ch 1152, §21; 97 Acts, ch 100, §9; 97 Acts, ch 104, §26, 27; 2008 Acts, ch 1124, §13, 40