Sixth Concordance

The Sixth Concordance is the foundational governing document ratified in Year 4 of the Third Librarianate, principally concerned with the authorization, regulation, and documentation of vertical exploration within The Tower. It formally established the procedural framework for Guided Descents, codified the doctrine of chronological precedence, and introduced the contentious principle of administrative velocity.

Provisions and Structure

The Concordance is divided into seventeen Clauses and nine Annexes. Key provisions include:

• Clause IV: Defines a Guided Descent as "a coordinated, Librarian-supervised passage downward for the primary purpose of cataloguing holdings not present on the initiating floor."
• Clause XVII.4: The most cited section, which authorizes a Descent to continue "until the subject is adequately catalogued," a phrase later elaborated in Annex Ω.
• Clause IX.2: Introduces the doctrine of chronological precedence, whereby in any dispute between Concordances, the most recently ratified point of order takes precedence, except where explicitly superseded. This created the complex web of cross-references seen in later documents like the Seventh Concordance.
• Annex Epsilon: Details the "Three-Velocity" system for assessing a Descent's progress: Catalogical Velocity (rate of new entries), Topological Velocity (rate of floor traversal), and Administrative Velocity (rate of form completion).

The Administrative Velocity Controversy

Annex Epsilon's inclusion of Administrative Velocity—measuring bureaucratic compliance against descent progress—proved highly divisive. The Office of Voluntary Correspondence, whose procedures some marginalia suggest predate the Concordance system (see the Kettleman Copy), argued it incentivized "form over finding." A famous incident, the Stalemate of Floor Ȣ, saw a Descent team stationary for 47 days while completing Form 17-G ("Declaration of Intent to Potentially Encounter an Unnumbered Landing"), citing high Administrative Velocity as justification. This led to the Seventh Concordance's Clause 4.19, which formally separated administrative and exploratory metrics.

Relationship to Other Concordances

The Sixth Concordance explicitly supersedes the Fifth Concordance in matters of vertical movement but defers to the Third Concordance on floor numeration (Clause 33, Annex Delta) and to the Seventh Concordance on the measurement of absent rooms. Its principle of chronological precedence created the conditions for its own partial obsolescence, particularly after the ratification of the Tenth Concordance, to which Annex Ω was later added as a clarifying addendum. Scholars of Concordant Law note the Sixth is unique in being both the authority for and the subject of several of its own Annexes.

Notable Expeditions Authorized Under Its Provisions

The majority of recorded Guided Descents in the mid-Librarianate period operated under Sixth Concordance protocols. These include:

• The Vellum Descent (Year 5, Third Librarianate), which catalogued the Sounds of Unwritten Prefaces before being recalled under Third Concordance Clause 17 for administrative redundancy.
• The Spiral 44 Expedition (Year 8), which established that Administrative Velocity could, in theory, exceed the speed of descent, resulting in the pre-completion of forms for floors not yet reached—a practice later banned by Ordinance 4.
• The Partial Survey, an ongoing, low-velocity Descent notable for its meticulous adherence to Annex Epsilon, producing more documentation on protocol than on any discovered holding.

Physical Instances and Variants

The master copy resides in the Central Scriptorium on Floor 314 (The Atrium of Submitted Forms). Twelve verified scribal copies exist, with the most significant variant being the Redactions Copy, held on Floor 199, which contains six struck-through clauses relating to the emergency suspension of chronological precedence—a power never invoked. The durability of the Sixth Concordance is often attributed to its embedded self-correction mechanisms, rendering it, in the words of Annex Omega, "perpetually provisional."