The
Bureau of Concordant Amendment (B.C.A.) is a standing office of the Librarians charged with the drafting, numbering, and post-hoc justification of amendments to the Concordances. It is the Tower's principal instrument of textual revision, and the only bureau whose own founding document it is forbidden to amend. The Bureau occupies the whole of
Floor 1122, a narrow spiral stack known informally as the Amendment Works, and reports jointly to the
Third Concordant Court and to the
Directorate of Concordant Integration, a division of authority that has produced four centuries of jurisdictional correspondence and almost no adjudicated outcomes. ## History The Bureau was constituted by
Amendment 12β to the Third Concordance, drafted by the same committee it later empowered, a procedural circularity that the Court has declined to review on the ground that the amendment was validly sealed before anyone noticed. Its first act was to establish a numbering convention; its second was to amend the convention. The original convention survives in the Works as a single sheet of vellum in a locked case, labelled
B.C.A. Instrument 1 (superseded), and is consulted roughly twice a decade in disputes about whether a number is a number or a name. The Bureau's early history is largely a record of ceilings. Between the winters of 2104 and 2106 the Works absorbed three adjacent stairwells, two landings, and a light well, none of which had been assigned floor numbers and all of which were nevertheless assigned amendment numbers, a decision that the
Bureau of Concordant Cartography has never accepted and continues to annotate on its registry plans as "the stairwell annexation." ## Numbering Amendment numbers run in the sequence in which an amendment is
conceived, not in which it is sealed, published, or reconciled. Because conception is not an observable event, the Bureau maintains the
Register of Intents, in which drafters are required to record the moment an amendment first occurred to them. Filing is permitted up to nine years after the fact. The result is a numbering sequence with gaps, reversals, and at least one integer that appears twice, distinguished in the register by handwriting. The Bureau's Chief Numberer,
Sabel Ferrow, held the post from 2401 to 2433 and is remembered chiefly for her ruling on the duplicate integer, in which she determined that "a number used twice is two numbers that agree" (B.C.A. Ruling 88, Works minute-book). The ruling was never overturned and is still cited. ## Relationship with other bureaux The B.C.A. drafts; it does not verify. Verification belongs to the
Bureau of Validation, citation to the
Bureau of Concordant Citation, and the ranking of amendments against one another to the
Bureau of Concordant Reconciliation, which recognizes nine tiers of Triggering Conditions and has repeatedly found that the Bureau's amendments trigger all nine at once. The B.C.A. maintains that simultaneity is not a defect. The
Directorate of Concordant Integration has twice contested the classification of Amendment 881 without success, and has since adopted the practice of contesting new classifications on the day of sealing, in writing, in advance of reading them. The
Bureau of Pre-Integration keeps these protests on file under a separate heading. ## The doctrine of retroactive necessity The Bureau's governing doctrine holds that no amendment may be shown to have been unnecessary, and that where an amendment appears unnecessary the record must be adjusted to demonstrate that it was not. This is not considered falsification. The Bureau's house commentary,
On the Necessity of What Has Been Done (3rd recension, 2318), argues that necessity is a property conferred by enactment rather than discovered before it, and that the archive's obligation is to the coherence of the whole rather than to the sequence of events. The doctrine has been challenged twice. In 2287 the
Curia of Concordant Interpretation held that an amendment may not be retroactive "beyond the point at which its author could still be consulted" (Curia Opinion 402), a limit the Bureau has interpreted as permitting consultation with the author's notes, colleagues, and, in one case, a locked drawer. In 2503 the
Office of Concordant Arbitration declined to hear a dispute on the ground that both parties were the Bureau. Scholars remain divided on the doctrine's origin. The standard account, following
Concordance 44, Amendment 12, traces it to a scribal dispute over whether a marginal gloss could be promoted to the main text; the revisionist account, advanced by the
Bureau of Cyclical Integration in its 2461 memorandum, holds that it was always there and the Bureau merely noticed. Neither side can produce a document that settles the question, which both cite as evidence. ## The Amendment Works The Works is closed to expeditions and open to filers by appointment. Its furniture is original. A rule of 1874, still enforced by the Works' porter, prohibits the carrying of unsealed amendments past the seventh turn of the spiral, on the ground that they have not yet decided what they are. Amendments awaiting classification are stored vertically in pigeonholes keyed to their intended Concordance. Amendments awaiting a number are stored horizontally, because they have nowhere to stand. Approximately four thousand are stored at an angle, a category the Bureau created in 2390 and has not explained. ## Criticism The
Bureau of Coherent Truths has observed that a bureau empowered to amend its own founding instrument and forbidden to do so is either redundant or unconstrained, and that the Tower has not decided which. The Bureau's published reply consists of a single line: "The question is under amendment."