Sovereign Sigil

The Sovereign Sigil is a non-transferable credential granted by the Office of Perpetual Affairs to a petitioner who has been successfully identified. It is not a pass, a warrant, or a deed of title; the Office has ruled repeatedly that it is "a statement of the fact of the holder, and not of the holder's business" (Eleventh Concordance, Annex 9). Every Sovereign Sigil carries a two-character checksum generated by the Babbage-Vane Cipher and a referent code traceable to the original Clause A.2 activation witness. A sigil whose checksum fails verification is void at the moment of presentation, and the bearer is remanded to the Identification queue he or she has plainly not yet cleared.

Inscription and the Clause A.2 Trace

Inscription is performed only at the Office of Perpetual Affairs, and only after Identification procedures have closed. The clerk of inscription does not adjudicate; the clerk of inscription transcribes. Each Sovereign Sigil is struck with the referent code of its activation witness, so that a sigil presented forty floors from its issue may be traced to the particular witness, on the particular day, who first confirmed the petitioner's existence. The trace is not a name-brand: it records a witness, not an identity, and the Office has been careful to say so since the affair of the duplicate witness Librarian Osett Vane in the winter of the forty-fourth recension.

The checksum is appended last, by Babbage-Vane Cipher, which is a two-stage substitution routine. Because the routine is public and the referent codes are not, a holder may verify a Sovereign Sigil at a glance without being able to forge one. This asymmetry is the whole of the sigil's security, and the Sigil-Depths has declined, four times, to improve upon it.

Form, Weight, and the Placement Box

The Sovereign Sigil is a flat token, commonly struck in tinned bronze, measuring 41 millimetres across and weighing 19.2 grams when issued. Wear reduces both figures; the Office does not replace worn sigils, since a Sovereign Sigil is not transferable and a worn sigil is still its holder's sigil. A calibrated Sigil Placement Box is used wherever the credential is measured during reclassification or sigil-transfer procedures, though the Office maintains that transfer procedures do not exist and that the Box is kept "for the convenience of those who believe they do" (Office of Perpetual Affairs, Circular 112).

"A Sovereign Sigil, once struck, belongs to the struck. The Tower does not lend it, sell it, inherit it, or improve it."

— Third Concordance, Annex 4

Precedence and the Provisional Question

Sovereign Sigils stand above Provisional Sigils in every ordering the Tower observes, and a Sigil of Perpetual Custody voids any Provisional Sigil automatically upon presentation. Where a Sovereign Sigil meets a Transitive Sigil, precedence is determined by Sigil Inertia, measured in the Placement Box. The Office of Perpetual Affairs has ruled in favour of Section D for intra-archive entities, which settled the question for entities but left the treatment of stairwells, dumb-waiters, and the moving shelves of Floor 219 formally undecided.

The Dispute of Sigil Alpha

Scholars disagree sharply over whether the Sovereign Sigil descends from, or merely resembles, Sigil Alpha. The Dewey-Sigil System enumerates sigils and designates the Sigil of Passage as Sigil Alpha, the first formally enumerated. The Sigil-Depths, which maintains the Primary Sigil Register and arbitrates disputes of sigil provenance, holds that the Sovereign Sigil is a later recension of Sigil Alpha and that the resemblance is therefore genealogical. The Office of Perpetual Affairs holds the opposite: that Sigil Alpha is a passage credential and the Sovereign Sigil a credential of identification, and that "a door and a person are not the same entry" (Circular 88).

The dispute is not academic. In the eighty-second recension, a petitioner presented a Sovereign Sigil at the Circulation Sigil desk of Floor 118 and was refused, on the ground that the desk recognised only Sigil Alpha. The resulting memorandum, The Refusal at Floor 118, was filed under Circulation and has never been answered. Sigil Authentication procedures were amended in consequence, and the amendment has itself been disputed under The Containment Sigil ruling, which concerned a different sigil entirely.

Loss, Damage, and the Little Rule

A lost Sovereign Sigil is not replaced; the holder is re-identified, and the Office issues a fresh sigil with a fresh referent trace. Because the checksum is computed from the trace, the two cannot be reconciled, and holders have occasionally attempted to keep the old sigil "for sentiment." The Office's position is that sentiment is not among the procedures it administers, and that the old sigil must be surrendered and struck through.

Sigils are not to be worn on the outer coat. Holders who disregard this are asked to leave the coat at the desk, and the desk will not hold the coat.

Damage short of destruction does not void a Sovereign Sigil provided the Babbage-Vane checksum remains legible as two characters. Below that threshold the sigil is void, and the holder's recourse is the Identification queue. The queue is long. The Office notes, without comment, that it has been long since the first recension.