Section 56-35-30 - Auxiliary power units(A) For the purposes of this chapter, operating an auxiliary power unit, generator set, or another mobile idling reduction technology as a means to heat, air condition, or provide electrical power, as an alternative to idling the main engine, does not constitute idling an engine.(B) For a vehicle equipped with an auxiliary power unit designed for idling reduction, the gross vehicle weight or axle weight used to determine the fine for a violation of commercial vehicle weight restrictions is the actual gross vehicle weight or axle weight reduced by five hundred fifty pounds.Amended by 2016 S.C. Acts, Act No. 188 (HB 4932), s 6, eff. 5/25/2016.2008 Act No. 234, Section 6, eff upon approval (became law without the Governor's signature on May 22, 2008).