[Martee]

Dear Martee,

I believe the answer to your question can be found in the 1-L sketch.

The stationary post is the player's head.

If we can imagine now, a stake driven through our head right into the ground, then that is the stationary post in the drawing....

Add our two legs and voila...that is the tripod.

Sorry, and no disrespect, but this is a canned answer in general.

I understand the 1-L-1 along with other reference regarding the stationary post as well as the reference 2-H that states that it is not mandatory.

If in fact what you describe as the Tripod and this imaginary line is the thrid leg, I would submit
a. This doesn't by definition mean it is in the center
b. If it does mean center then we are talking two legs being equal to for an isoscele triangle, which would then place the apex in the center creating two rt triangles when a line is extended from the apex to the base.
c. Tripod gives the indication of 3 supporting points required. Having the third point lie between the other two doesn't meet the criteria for a tripod.

The really strange thing to me is that this would mandate a position vs an alignment.