1 files changed, 87 insertions, 0 deletions
diff --git a/lib/rites/rite_of/precedence_of.ml b/lib/rites/rite_of/precedence_of.ml
index 5344374..0e2c246 100644
--- a/lib/rites/rite_of/precedence_of.ml
+++ b/lib/rites/rite_of/precedence_of.ml
@@ -124,6 +124,87 @@ let is_nativity_octave_day (ctx : Vocab_of.season Precedence.context) =
 let is_lenten_feria (ctx : Vocab_of.season Precedence.context) =
   ctx.season = Vocab_of.Lent
 
+(* W3 (of-known-wrongs, 2026-08-26). Both are shipped MOVABLE obligatory
+   memorials of the BVM (data/of/calendar-2002.sexp: [immaculate-heart-of-mary],
+   Easter_offset 69; data/of/amendments/006-mary-mother-of-the-church.sexp:
+   [mary-mother-of-the-church], Easter_offset 50), and both can land on a
+   FIXED obligatory memorial's own date in a real year -- confirmed, not
+   merely possible: e.g. 2011-06-13 (Mater Ecclesiae vs Anthony of Padua) and
+   2015-06-13 (Immaculate Heart vs Anthony of Padua, three years apart via
+   the other offset). Both candidates then band identically at Tabula
+   III.10 (100, both universal Memoria_obligatoria) -- a tie {!band} could
+   not break on its own, so {!Colitur_kernel.Precedence.resolve}'s kernel
+   tie-break (Slug.compare, alphabetical) silently decided instead: 892 days
+   for Mater Ecclesiae and 1109 for the Immaculate Heart across 1583-9999
+   (measured with the fix applied and compared against the plain alphabetical
+   order every one of those days would otherwise have taken -- see this
+   task's own report for the full sweep).
+
+   NEITHER of colitur's two checked primary sources resolves this: the 2018
+   decree inscribing Mater Ecclesiae (AAS 110, 437-438) is silent on
+   universal-calendar coincidence (its own coincidence clause covers only a
+   PARTICULAR calendar keeping the celebration on a different day at a
+   higher grade); Normae n. 14's third clause ("Si eodem die plures
+   inscribuntur in calendario memoriae ad libitum, una tantum celebrari
+   potest, omissis ceteris.") resolves only memoriae AD LIBITUM colliding
+   with each other, and n. 14's second clause covers only the Lenten-feria
+   case. Two OBLIGATORY memorials colliding is genuinely unaddressed by
+   either.
+
+   RESOLVED on a THIRD, later primary source, found by searching the
+   corpus (docs/research/of/), not invented: the Congregation for Divine
+   Worship and the Discipline of the Sacraments' own "Notification on the
+   Memorial of the Blessed Virgin Mary, Mother of the Church" (24 March
+   2018 -- the SAME dicastery, the SAME two signatories, Robertus Card.
+   Sarah [Praefectus] and Arturus Roche [Archiepiscopus a Secretis], as the
+   11 February 2018 decree itself). Published only on the Dicastery's own
+   site (vatican.va/roman_curia/congregations/ccdds/documents/
+   rc_con_ccdds_doc_20180324_notificazione-mater-ecclesiae_{en,it,la,sp}.html);
+   confirmed NOT listed in the AAS 2018 combined index
+   (docs/research/of/aas-indices/aas-indice2018.pdf, checked directly via
+   pdftotext) alongside the decree it follows up, which IS indexed there
+   (p.437) -- so this is a genuine dicasterial clarification, not an AAS
+   promulgation, and is cited as such rather than papered over as "AAS n.".
+   Its own operative Latin: "In casu occurrentiae huius memoriae cum alia
+   memoria principia generalia normarum universalium de Anno liturgico et
+   de Calendario (cf. Tabula dierum liturgicorum, n. 60) sequenda sunt. Cum
+   autem memoria B.M.V. Ecclesiae Matris sit Pentecoste coniuncta, sicut
+   pariter memoria Immaculati Cordis B.M.V. celebrationi Sacratissimi
+   Cordis Iesu coniuncta est, in casu occurrentiae cum alia memoria
+   alicuius Sancti vel Beati, iuxta liturgicam traditionem praestantiae
+   inter personas, memoria B.M.V. praevalere debet." The Dicastery's own
+   official English: "In the case where this Memorial coincides with
+   another Memorial the principles of the Universal Norms... are to be
+   followed (cf. Table of Liturgical Days, n. 60). Given that the Memorial
+   of the Blessed Virgin Mary, Mother of the Church is linked to Pentecost,
+   as the Memorial of the Immaculate Heart of the Blessed Virgin Mary is
+   similarly linked to the celebration of the Most Sacred Heart of Jesus,
+   then, in the case where it coincides with another Memorial of a Saint or
+   Blessed, and following the liturgical tradition of pre-eminence amongst
+   persons, the Memorial of the Blessed Virgin Mary is to prevail." The
+   Notification itself names BOTH memorials by this same analogy -- Mater
+   Ecclesiae's own rule IS the Immaculate Heart's pre-existing one, restated
+   -- so both are listed here, not only the one this task's own defect
+   report was filed against.
+
+   THIS IS THEREFORE A RUBRIC, NOT COLITUR'S OWN REASONED CHOICE: a
+   primary, dicastery-issued clarification of universal application, not an
+   analogy imported from the EF's own RG 91 entry 14 (which was the
+   fallback this task's brief authorized if nothing resolving turned up).
+
+   Implemented as a sub-rank strictly BETWEEN Tabula entries 9 and 10 (95,
+   not 100/110) -- the same "fits between neighbours" technique this
+   module's own header comment documents for exactly this situation. Never
+   climbs above entries 1-9: neither memorial's own date range (Easter+50 =
+   11 May-14 June; Easter+69 = 30 May-3 July) can ever reach a Tabula 1-9
+   day, so 95 is inert there. Deliberately NOT a [subject = Bvm] rule: the
+   Notification's own reasoning is specifically that EACH of these two
+   memorials is tied to a movable SOLEMNITY OF THE LORD (Pentecost, the
+   Sacred Heart) -- a FIXED BVM memorial (e.g. Our Lady of Guadalupe, 12
+   December) gets no such boost, because nothing in the Notification's own
+   text extends this to Marian memorials in general. *)
+let movable_bvm_memorials = [ "mary-mother-of-the-church"; "immaculate-heart-of-mary" ]
+
 let band (ctx : Vocab_of.season Precedence.context)
     (c : Vocab_of.rank Precedence.candidate) : int =
   let temporal = c.Precedence.origin = Precedence.Temporal in
@@ -191,6 +272,12 @@ let band (ctx : Vocab_of.season Precedence.context)
     temporal
     && (is_late_advent_feria ctx || is_nativity_octave_day ctx || is_lenten_feria ctx)
   then 90 (* Tabula II.9 *)
+  else if
+    c.cel.rank = Vocab_of.Memoria_obligatoria && List.mem (slug_of c) movable_bvm_memorials
+  then
+    95 (* Between Tabula 9 and 10 -- W3, see [movable_bvm_memorials]'s own
+          comment above for the Notification this cites and why it is
+          scoped to these two slugs rather than [subject = Bvm]. *)
   else if c.cel.rank = Vocab_of.Memoria_obligatoria && not (is_proper layer) then
     100 (* Tabula III.10 -- universal or proper; the [layer] test is what
            separates entry 10 from entry 11. Unlike entries 3, 5 and 7, "or