680.40 tells us that spas and hot tubs shall comply with parts I and IV of article 680.
680.42 tells us that outdoor installations of spas and hot tubs shall comply with parts I and II. I interpret this to mean the installation shall comply with 680.26(2)(a) regarding equipotential bonding of steel reinforcing within the poured slab that the spa sits on. So am I correct that a new spa installation shall have a #8 GEC attached to the steel before the concrete is poured, to be bonded to the unit at installation?