The Sunset Clause

The Sunset Clause is the generic designation applied throughout the Tower's legal architecture to any provision that fixes in advance the moment at which a document, office, or entity ceases to hold authority. It is distinguished from Clause 2 in that a Sunset Clause is a component drafted into an instrument at its making, whereas Clause 2 is an external provision applied to entities whose Custodial Mandates have been fulfilled. The distinction is observed with great rigor and has never once prevented the two from being confused in litigation.

No single Sunset Clause exists. The Archive of Instruments Expired, maintained on a floor whose number is disputed between 1,214 and 1,241 (the ledger and the stairwell disagree; see Clause 7.8), records some eleven thousand variants, of which roughly nine hundred remain in force because their sunset dates have not yet arrived and cannot be verified.

Origin and early drafting

The device is traditionally traced to the Seventy-Fourth Concordance, which contained a Sunset Clause transferring authority to the preparatory committee for the Fifth Librarianate. That clause is regarded as the model: it named the terminating event, the authority receiving the residue, and a period of grace measured in sittings rather than days. The Fifth Librarianate's tenure was itself defined and ended by the same instrument, which the Theoretical Jurisprudence Guild has cited as evidence that a clause may close a door it has not yet opened.

Earlier precedent is claimed from the emergency provisions of the Third Concordance, whose Annex 7 documents the Administrative Sunset ritual. The Guild disputes the attribution, noting that Annex 7 describes a ceremony rather than a provision and that the ceremony has on three recorded occasions been performed without any instrument expiring.

Common forms

Four forms recur often enough to have acquired names of their own:

• The dated sunset, which specifies a day and has failed on every occasion the specified day has fallen on a floor without a clock.
• The conditional sunset, which terminates upon an event, most often the completion of a Custodial Mandate.
• The recursive sunset, exemplified by the Series Omega Compendium, in which two edicts cite each other's expiry as the condition of their own, producing an instrument that has been expired and unexpired forty-one times.
• The voluntary sunset, the least used and least understood, treated at length under Declaration of Impermanence.

A fifth form, the implied sunset, holds that a document drafted without any termination provision expires when the office that drafted it ceases to exist. This is argued chiefly by clerks who have outlived their offices.

Matters of form

Sunset Clauses are numbered within their parent instruments, never within themselves. The numbering is not sequential, and a clause's position in a document bears no relation to its effect. The Office of Clause Sequence issues a register each quarter; the current register runs to forty volumes and is consulted by two readers.

By convention a Sunset Clause is drafted in the present tense and stated in the negative. The preferred formula, given in the drafting notes attached to the Ninth Concordance, Revision 1, reads: "On the day herein fixed this instrument shall not avail." The notes record that the negative form was adopted after an affirmative draft was read aloud and the instrument expired prematurely in the reading. Clause numbering in the same revision was amended to exclude the number thirteen, as instruments bearing it were found to expire on sight.

"A clause that cannot say when it ends cannot say what it does."

— Ninth Concordance, Revision 1, drafting notes, folio 12

The Kessarine dispute

The governing question — whether a Sunset Clause takes effect at the moment of expiry or at the moment of its registration — has occupied the Concordance Court of First Recension since the winter of the year the stairwell at 1,214 iced over. The case arose from a provision drafted by the underscribe Kessarine of the Fourth Landing (Kessarine), whose clause was registered eleven days after its stated date. Kessarine argued that the clause had expired before registration and therefore never existed; the office it was meant to close argued that it had therefore never closed.

Both parties were upheld. The Observations of the Presiding Recensor of that term record the difficulty plainly: "Where an instrument expires before it is entered, the archive can neither hold it nor release it, and the reader is advised to consult the shelf, not the index." Kessarine was subsequently appointed to the register, where it is said the entry remains uncorrected.

The Court has since held that a Sunset Clause registered late remains in force until the registration is itself annulled, and that annulment requires an Ordinance of Necessity. No Ordinance of Necessity has been sought for the purpose, on the ground that seeking one would require naming the entity to be sundered, which would resolve the dispute in favour of the office.

Interaction with other provisions

Sunset Clauses drafted into instruments of temporary authority are routinely accompanied by an Ordinance of Necessity, which must carry its own sunset clause. The requirement is circular by design and is acknowledged as such in the Duration and Review Clause, which permits an Ordinance to persist for one sitting after its subject has expired so that the expiry may be recorded.

Probationary reinstatement under the Annex of Conditional Sunset depends on the clause having been properly cited at dissolution; where it was cited only in the index, reinstatement is granted and then withdrawn at the next recension. Instruments that omit a Sunset Clause altogether are governed by the residual Sunset Provision, which supplies one. The Theoretical Jurisprudence Guild has noted that Clause 17.404.1a, which it drafted, lacks a sunset provision, and that the Guild has resolved not to discuss the matter further.

The Gallery of Perpetual Sunset, although named for the device, is unaffected by any Sunset Clause whatever, its Custodial Mandate being of indefinite term. Its waiting list is managed under separate authority.