761—520.3 (321) Motor carrier safety regulations exemptions.
	 520.3(1) The following intrastate vehicle operations are exempt from the motor carrier safety regulations concerning inspection in 49 CFR Part 396.17 as adopted in rule 761—520.1(321):
	  a.   	 Implements of husbandry including nurse tanks as defined in Iowa Code section 321.1.
	  b.   	 Special mobile equipment (SME) as defined in Iowa Code section 321.1.
	  c.   	 Unregistered farm trailers as defined in 761—subrule 400.1(3), pursuant to Iowa Code section 321.123.
	  d.   	 Motor vehicles registered for a gross weight of five tons or less when used by retail dealers or their employees to deliver hazardous materials, fertilizers, petroleum products and pesticides to farm customers.
	 520.3(2) Reserved.
This rule is intended to implement Iowa Code sections 321.1, 321.123, 321.449 and 321.450.