This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
The Right Angle Cross of Planning, in this ordering, carries the same pair as the earlier Cross of Planning with sun and earth exchanged, Gate 9 and Gate 16, small detail exposed ahead of practiced skill. Its first article reads Gate 9 as the capacity to attend to the small details a larger idea depends on, and Gate 16 as a natural talent refined by repetition into real skill. What it does not trace is where the four gates sit on the wheel itself, the Human Design mandala's division of its sixty four gates into four Quarters, and by that measure this ordering draws one gate from each of the four.
Gate 9, the personality gate here, falls in the Quarter of Mutation, purpose fulfilled through transformation. Gate 16, its personality partner, falls in the Quarter of Civilization, purpose fulfilled through form. Behind them, Gate 40 falls in the Quarter of Duality, purpose fulfilled through bonding, and Gate 37 falls in the Quarter of Initiation, purpose fulfilled through mind.
So the attention to small detail and the proven skill the first article reads on this ordering's surface answer to the arcs of transformation and form, while the will's need for solitude and the household bargain beneath them answer to the arcs of bonding and mind, the same four arcs the rest of the Planning family draws on however its two pairs are assigned to personality and design. Detail placed ahead of skill changes what this variant puts forward, but not which Quarters supply its four gates.