Penner Boundary Ruling

Scope and standing

The Penner Boundary Ruling of 1,412 is the standing determination by which the Tower settles disputes over which floor owns a landing — that is, the short horizontal stretch between a stair-head and the threshold of the first chamber on a floor. Before 1,412 such landings were frequently claimed twice, or by neither floor, and were treated in practice as corridors belonging to whichever office had last swept them. The Ruling ended that practice by establishing that a landing follows the jurisdiction of the chamber it gives onto, unless the chamber's own threshold is displaced, in which case the landing follows the stair instead. The clause is short; the number of floors on which it has been invoked is not. It is cited in some form in the great majority of Boundary Arbitration hearings held since its sealing.

Authorship

The Ruling bears the name of Hollis Penner, a clerk of the Registry of Vertical Claims who was, at the time of drafting, four years into a junior appointment he had held since his admission in 1,396. Penner did not sit on the arbitral bench and did not argue the case. He wrote the operational draft on loan to the Directorate of Boundary Arbitration and initialled the margin where the operative clause now sits, which is why the Ruling carries his name rather than that of the presiding officer. This attribution has been disputed twice, in 1,441 and again in 1,503, on the grounds that a clerk of Penner's grade could not have originated a determination of this standing. Both objections were dismissed on the documentary point that the initialled margin exists. Penner's adversary in the later years of his career, Maude Ferrant, Registrar of Downward Precedent, maintained until her retirement that the initialling was a filing convention rather than an act of authorship. Her dissent is preserved in the Registrar's annex and is not binding.

The landing question

The difficulty the Ruling resolves is topographic rather than philosophical. A landing is not a room; it has no inventory, no custodian, and no door of its own. It is also not a stair, because it is level. Under the recension of the Third Concordance in force before 1,412, landings were assigned by measuring from the stair-head, which produced the absurd result that a landing serving a single chamber could be assigned to a floor above or below it depending on which stair the measurer happened to descend by. The most-cited instance is the pair of landings on Floor 7,412, which were held by three separate offices over eleven years, none of which could say how it had come into possession. The Ruling's clause resolves the ambiguity by making the chamber decisive:

"Where a landing gives upon one chamber only, the landing follows that chamber's threshold; where it gives upon more than one, it follows the stair by which it is reached, and the chambers take what remains."

— Penner Boundary Ruling, Clause 2

The clause was drafted to be operational rather than definitional, which is why it refers to thresholds and stairs and not to jurisdictions. This has consequences. Several subsequent determinations — among them Ruling 188-A and the reasoning underlying Ruling on Residual Rhetoric — treat Clause 2 as establishing a general principle about the primacy of the aperture over the enclosure. Boundary Definitionists dispute this reading and hold that the clause governs landings only, citing Ruling 88.45 in support of a narrower construction.

Subsequent history

The first decades after sealing were quiet. The Ruling was invoked routinely, its clause reproduced in the manuals issued to Certified Boundary Clerks, and its standing questioned by no one with standing to question it. The first serious strain came with the disputes catalogued in the Ledger of Initial Anomalies, where landings were found to serve chambers whose thresholds had been moved so often that "the chamber it gives onto" had no stable referent. The Warden of Boundary Arbitration addressed the problem in part by issuing the Attestation of Non-Contradiction, which extinguishes the older claim rather than resolving it.More troublesome were the cases where the landing served nothing at all. The Plenum Boundary hearings of the mid-1,400s, and the extensive documentation generated by the ruling on the Plenum Boundary of Floor 7,412, turned repeatedly on whether a landing opening onto a void should be read as following "the chamber it gives onto" in the absence of such a chamber, or falling back on the stair. The first reading was preferred and produced the awkward category of the orphan landing, of which the Tower's current inventory lists nineteen. The Ruling's interaction with the Delineative Boundary remains unsettled. The Tower has not attempted to settle it.

Notes on practice

Two practical points are recorded in the operational annex. The first is that measurement for the purposes of Clause 2 is taken from the stair-head to the outer face of the threshold, not to the doorframe; the distinction has decided four hearings and is a common source of error among newly admitted clerks. The second is that no hearing on a landing may be convened while the landing is in use for the storage of ladders. Visitors are reminded that landings are not resting places, and that the chairs appearing on certain landings near the Registry were placed there without the concurrence of either adjoining floor and are the subject of a separate proceeding.