The Non-Summable Magnitude, deposit #1622 of the Crimson Hexagonal Archive (16 September 2026), states the converse of a section in its companion paper on substrate sovereignty, which had held that a sovereign substrate cannot be audited from inside its own grammar and had left the reverse unstated. The obvious converse — that a substrate able to inscribe another's grammar thereby holds jurisdiction over it — is rejected as too strong, since inscribing money's grammar does not stop money settling or discharging obligations. What the paper argues instead is a claim about expressive capacity, from which jurisdiction is derived rather than assumed. Its formal primitive is a typed magnitude: not a number, but a number together with the operations its own grammar licenses without an additional commensuration contract. Non-summability is then native non-licensing rather than the non-existence of any operation, a distinction that matters because a weighted index can be built over any two numbers, and building one creates a new representation under a new contract rather than showing the magnitudes to have been summable. The resulting signature is that the money-form cannot natively preserve a prohibition on the operations constitutive of monetary equivalence: money can carry the digits of a ratio, but not the ratio together with a constraint forbidding its aggregation, which must arrive as an attached legal, contractual or accounting qualifier. On that repair the standard counterexamples become instances. Restricted cash is currency plus a covenant and the currency adds perfectly well; segregated accounts are a legal wall around fungible units; maturity classes commensurate under discounting, an operation supplied to make them addable; and different currencies are the strongest case for the thesis, since money's response to two non-identical units is to build an exchange rate rather than to preserve the distinction. In every case the non-fungibility is carried by something other than the money-form, and that something performs the function the meaning layer performs. The exhibit is the archive's flattening battery, whose seven emitted quantities are scalars and none prices, and whose distinction-survival measure commensurates within one item's reference inventory and across items not at all. The paper states its result as a structure-preserving expressive embedding, demonstrated in one direction by the sequence's first worked audit and conjectured false in the other, and declines to write the result as set inclusion, since that notation would collapse a demonstrated half and a conjectured half into one symbol. Related: #1617, #1620, #1616, #1619, #311.