At what level does "Triple Star Thru" become "those who can" for all 3 parts?
(It is certainly called this way at relatively low levels).
Triple Star Thru is always a 'those who can' call for all 3 parts.
At A1, there are two common starting formations for Triple Star Thru:
- Starting DPT with centers normal and outsides half-sashayed.
(Centers do parts 1 and 2; Everybody does part 3)
-
Eight Chain Thru formation with everyone normal couples.
(Everybody does parts 1 and 2; Centers do part 3)
As a side note, I've only ever found two other (non-asymmetric)
starting formations for Triple Star Thru. The easiest
starting formation can be setup from normal facing lines
after one of the couples does a Trade & Roll
(e.g., from Heads Lead Right, Circle To A Line + Sides Trade & Roll).