On 2006-12-15, BobK207 wrote:

Do I have to pigtail the ground & jumper to each device

OR

can the fact that the box is permanently grounded do the trick?

Some devices come with a spring clip around one of the screws in the
strap that is meant to provide a grounding path when mounted in a
metallic box. With such devices I believe it is NEC compliant to omit
any additional grounding. However, I would consider a pigtail to the
grounding screw to be a more secure grounding path.

Yours, Wayne