I can tell you what Savaria will recommend you do. However with regard to the code for VPL inspections with specificity to North Carolina, that I would have to research a bit more.

You should just be able to pop onto the dealer site of Savaria and grab the manual for that particular lift and go to the "Maintenance Schedule" section.

Do you know what model of VPL you're installing? I can grab you the manual off the dealer end if you don't have access, but honestly, they're pretty widely available on Google if you search for the model.