I do think so:
680.74 Bonding. All metal piping systems and all grounded
metal parts in contact with the circulating water shall be
bonded together using a solid copper bonding jumper, insulated,
covered, or bare, not smaller than 8 AWG. The bonding
jumper shall be connected to the terminal on the circulating
pump motor that is intended for this purpose. The bonding
jumper shall not be required to be connected to a double insulated
circulating pump motor. The 8 AWG or larger solid
copper bonding jumper shall be required for equipotential
bonding in the area of the hydromassage bathtub and shall not
be required to be extended or attached to any remote panelboard,
service equipment, or any electrode.