The parts of MaH (gematria 45) and BaN (gematria 52) from which the Partzufim were made are not discernible in the governmental order.
The specific parts of MaH and BaN that produced each Partzuf are not visible in the revealed governmental order. Composition history is hidden; role is visible.
Op. 83 specifies a structural feature of the revealed-versus-concealed distinction. Each Partzuf was produced by a specific historical process of selection and integration from MaH and BaN. That history is not visible at the operational surface; only the Partzuf's current operational role is visible.
When Klach treats Zeir Anpin (Z"A)'s CHaDaR governance, or Nukva's coupling architecture, or A"A's Beard-Tikkunim — at no point does the discussion need to reference which sparks of MaH and which sparks of BaN were combined to produce these structures. The composition history is hidden; the operational role is visible.
This is structurally important for the methodology of the second half of the book. The investigation can focus on what each Partzuf does (the revealed function) without needing to specify which broken-vessel sparks were combined to produce it (the concealed history). The history is operationally registered (in the concealed government) but operationally bracketed (in the revealed government).
Op. 84 will say every Partzuf has two aspects — concealed combination inside, revealed function outside. Op. 138's closing operational mechanism operates entirely at the role-visible level; the composition-history remains in the concealed register.