Departure Slip (DS-7 series)

The Departure Slip (DS-7 series) is a standard administrative form, issued in triplicate, required to authorize and document passage between the discrete floors of The Tower. As the primary instrument of transit accounting, its completion, validation, and archival constitute the procedural core of the Office of the Clerk of the Threshold. The DS-7 series exists within a complex ecology of related slips, including the Preliminary Entry Slip, the Form 88-C: Provenance Slip, and the Circulation Slip, with which its filing is often interdependent.

Physical Format and Distribution

The DS-7 is a continuous, three-ply form printed on grade-7 archival paperstock, distinguished by its iron-gall ink watermark depicting the Sigil of Perpetual Custody. The top (canary) copy is retained by the departing entity, the second (vermillion) copy remains with the issuing Clerk for the active transit ledger, and the third (archival) copy is consigned to the floor of origin's local repository. Each sheet is perforated and pre-stamped with a sequential 12-digit alphanumeric identifier, known as the Aperture Code, which must correspond with an entry in the Clerk's master log, Annex Δ. Misalignment of the Aperture Code across the triplicate set invalidates the entire slip.

Mandatory Fields and Completion

Section A of the DS-7 requires the declarant's stated intent of egress, including the target floor number (or named designation, if applicable), the proposed route (e.g., Primary Stairwell, service conduit, or authorized canal), and the estimated duration of absence. Section B is reserved for the inventory of any catalogued items, concepts, or atmospheric conditions being transported, which must be cross-referenced with the originating floor's master inventory folio. The most contentious field is Section C, "Reason for Departure," which offers a constrained set of checkboxes including "Administrative Recall," "Cross-Reference Verification," "Estate of Melancholy" (per relevant ordinances), and the perpetually debated "Spontaneous Egress."

Procedural Integration and Contingencies

As per Spiral Concordance clause 88.3.7, "No entity shall be considered in transit without a validated DS-7 in hand." Validation requires the embossed seal of the issuing Clerk and, in cases involving material transfer, a countersignature from the floor's Archivist-in-Residence. Crucially, the DS-7 is rarely a standalone document. For any petition involving the permanent relocation of a catalogued holding, the DS-7 must be accompanied by a Form 88-C: Provenance Slip. Furthermore, as noted in the Annals of Jurisprudence (Vol. XII, p. 455), each MAA-3 form—used for auditing ambient philosophical residue—must also be accompanied by a valid DS-7 series Departure Slip, creating a frequently cited bureaucratic loop for survey teams.

Disputes and Threshold Grace

The Office of the Clerk of the Threshold is the final arbiter of contested DS-7 filings. Disputes most commonly arise from ambiguities in Section C, particularly claims of "Spontaneous Egress," which the Third Concordance defines as "a departure unbidden by agenda yet compelled by archive." The Clerk evaluates such claims against the phenomenological record, seeking evidence of what is informally termed Threshold Grace—a documented, non-volitional alignment with an inter-floor aperture. A successful claim results in the issuance of a Terminal Slip and subsequent Terminal Certification, though this process itself requires a separate, validated DS-7 to be filed, a paradox often mediated under the Silence Edict.

Archival Status and Obsolescence

Upon completion of transit, the canary copy is surrendered to the receiving floor's Clerk, who reconciles it with their own vermillion copy of the corresponding arrival slip (Form AR-2). The two are then fastened together and entered into the perpetual transit ledger. The third, archival copy remains the property of the floor of origin and is eventually bound into that floor's dedicated volume of the Inventory of Impossible Geometries, under the sub-heading "Transits and Permutations." It is worth noting that while the DS-7 series is considered current, over 217 distinct predecessor series have been catalogued, and scholars of the Spiral Concordance frequently debate whether the form's function has remained constant across all its iterations, or if the very act of filing a departure slip subtly alters the nature of the departure it purports to merely document.