Clause 6.20.σ (Sigil Protocol)

Clause 6.20.σ (Sigil Protocol) is the provision of Elara’s Protocol governing the reuse of a Sigil of Passage within the same descent. Enacted in the fourth recension of the Protocol and never repealed, it holds that a Sigil of Passage, once illuminated for a Downshifting protocol, retains residual charge for a period not exceeding eleven floors, and may be re-presented at any landing within that interval without a fresh illumination. Clause 6.20.σ is the shortest provision in the Protocol and the most litigated. It is also, by the count of the Bureau of Protocol Ratification, the single most amended clause in the whole of the sigil corpus, having accumulated nine readings, four explanatory annexes, and one formal apology.

Text and the problem of the eleventh floor

The operative words of the clause are these:

"A Sigil illuminated for descent shall not be extinguished at the first landing, but shall carry for eleven floors, and at the twelfth shall be accounted spent."

— Elara’s Protocol, Clause 6.20.σ

The difficulty, noted within a season of enactment, is that the Tower's floors are not numbered sequentially, and the clause does not say whether the eleven are counted by descent, by landing, or by the ordinal markings on the doorframes. A party descending from a floor marked 400 to one marked 11 has, in the ordinary sense, gone down one floor; by the ordinal count they have gone down three hundred and eighty-nine. The Office of Vertical Measure maintains that the clause was always intended to count landings, since it is landings that a descent actually traverses, while the Scriptorium of the Sigil-Depths reads "eleven floors" as a plain reference to the numbers on the doors, which it calls "the only floors the Tower has ever admitted to having."

The disagreement has practical consequences. Parties relying on the ordinal reading have arrived at their destination to find their sigil already spent under the landing reading, and have been obliged to queue for re-illumination at the Aperture Registry while their descent window closed. The Registry keeps a standing apology for this, posted at the third landing, which is not an apology.

The Provisional Sigil overlap

Clause 6.20.σ is frequently confused with the Provisional Sigil (Ψ), because both provisions concern sigils that remain valid for a bounded period. The confusion is not merely popular; the Manual of Custodial Protocol addresses it directly in Clause 14(b), which distinguishes sigils applied in error from sigils applied provisionally, and observes in passing that "the resemblance between the provisional mark and the carriage provision has cost the Depths more ink than any single descent." The distinction is this: a Provisional Sigil under Elara’s Protocol invokes Provisional Reality and is a matter of classification, whereas the residual carriage of Clause 6.20.σ is a matter of passage and does not alter the status of the holder. A party carrying a spent sigil is not unreal; they are merely stationary.

Matters were not helped by the Bureau of Protocol Ratification's Logistical Division, which for a period of some years stamped the Provisional Sigil (Ψ) onto summaries that quoted Clause 6.20.σ, on the reasoning that the clause was itself provisional pending resolution of the counting question. The stamps were later ruled improper by the Seventh Concordance, Clause 18 (Amended), which held that a clause under dispute is not thereby provisional, "dispute being the ordinary condition of clauses."

Sigil Inertia and the Perpetual Custody question

Because Clause 6.20.σ extends the life of a sigil past its first use, it is the principal source of cases of Sigil Inertia — the tendency of an illuminated sigil to continue exerting authority after its bearer has abandoned the descent. A sigil carried under 6.20.σ and left on a landing does not go dark; it waits. The Witnessing Protocol requires that any such found sigil be witnessed and reported, and the Containment Sigil is applied to those that cannot be matched to a living descent.

The question arose in the matter of Sigil 8.14.γ-α, which was found still faintly illuminated on a landing some decades after its bearer's descent had concluded, and which the Depths argued had been kept alive by the carriage provision. The Sigil of Perpetual Custody placed it into indefinite escrow under Seventh Concordance, Clause 18 (Amended), without resolving whether 6.20.σ had applied to it, and the matter remains formally open. Sigil 8.14.γ-β, found on the same landing, was ruled spent under the plain reading of the clause and disposed of by ordinary procedure, a discrepancy its custodians have never accepted.

The Winter of the Double Descent

The clause's most cited incident occurred on floor 211 in the winter of the year the Aperture Registry calls the Quiet Season, when a party of eleven descended twice through the same landing on the strength of a single illuminated sigil, each member invoking 6.20.σ independently. The landing's Circulation Sigil, which governs sanctioned movement within ducts and is formally recognized by Annex D, Clause 7.1.5, registered eleven passages against one illumination and raised a discrepancy flag. The party maintained that the clause permits reuse by the bearer, and that each was the bearer. The Registry maintained that there was one sigil and therefore one bearer, and that the other ten had been conveyed without authority.

The ruling, issued the following spring, established that the carriage of 6.20.σ attaches to the sigil and not to the party, and that a party of eleven must therefore illuminate eleven times, "the clause being silent on companionship and the Tower being silent on discounts." The Dewey-Sigil System, which preceded Elara’s Protocol and proved inadequate to fluid permissions, had no carriage provision at all; the Registry's clerks sometimes remark that the old system at least never asked them to count.

Later readings

Of the nine readings of Clause 6.20.σ, six concern the counting question, two concern the treatment of spent sigils found in ducts, and one — the sixth reading, issued without explanation and withdrawn the same year — consists of a single sentence: "The eleventh floor is not a floor for these purposes." No clerk has been found to explain it, and the Scriptorium of the Sigil-Depths has declined to annotate it, on the grounds that annotation would imply the reading had a meaning.

Parties undertaking a descent are advised to present their sigil at every landing regardless of remaining charge, as a courtesy to the Aperture Registry and to avoid the queue. Sigils found on landings should be witnessed and left in place. Do not carry a found sigil down; it will carry you instead, and the eleventh landing is not always where one expects.