Rigging/Tagging Legs and Feet

When adding rigging to a puppets legs: 

I have the following layers (same for right leg)

     Left Leg ->

            Leg - artwork/path for leg

            Foot - artwork/path for foot

I'm having trouble with what layers to add the tags.  So for Leg tags (hip, knee, ankle and sticks) do they go in the outer Left Leg layer or in the inner Leg layer (does it matter which)?

For the Toe and Heel tags do they go in the Foot layer or the Left Leg layer?

Last question, if I want the feet to stay fixed on the ground, do I add the Fixed (thumb tacks) to the foot layer, leg layer, or upper most character layer?

Thanks,

Robb