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  },
  {
   "registration": "02-0866",
   "period": "2024-12"
  },
  {
   "registration": "02-0866",
   "period": "2025-01"
  },
  {
   "registration": "02-0866",
   "period": "2025-02"
  },
  {
   "registration": "02-0866",
   "period": "2025-07"
  },
  {
   "registration": "02-0866",
   "period": "2025-09"
  },
  {
   "registration": "02-0866",
   "period": "2025-10"
  },
  {
   "registration": "03-1538",
   "period": "2025-01"
  },
  {
   "registration": "03-1538",
   "period": "2025-02"
  },
  {
   "registration": "03-1538",
   "period": "2025-05"
  },
  {
   "registration": "03-1538",
   "period": "2025-06"
  },
  {
   "registration": "03-1538",
   "period": "2025-07"
  },
  {
   "registration": "03-1538",
   "period": "2025-08"
  },
  {
   "registration": "03-1538",
   "period": "2025-09"
  },
  {
   "registration": "03-1538",
   "period": "2025-10"
  },
  {
   "registration": "03-1538",
   "period": "2025-12"
  },
  {
   "registration": "03-1538",
   "period": "2026-01"
  },
  {
   "registration": "03-1538",
   "period": "2026-02"
  },
  {
   "registration": "03-1538",
   "period": "2026-03"
  },
  {
   "registration": "03-1538",
   "period": "2026-04"
  },
  {
   "registration": "03-1538",
   "period": "2026-05"
  }
 ],
 "cannot": [
  {
   "field": "a throughput from any one filer's lines",
   "why": "a handoff between two held filers is on both returns. `throughput` counts it once, from the delivering side, and leaves self and intra-group lines out; `monthly` keeps every line as filed, so summing it states the same barrel twice",
   "unblocked_by": "nothing \u2014 it is what the form asks two companies to do"
  },
  {
   "field": "a coordinate for a facility with no accepted override",
   "why": "the geocoder writes proposals (t1_geo_proposal) and nothing else; a pin is an inference and only a human moves one into config/t1_facilities.yaml geo_overrides (DECISIONS.md 2.19)",
   "unblocked_by": "an accepted geo_override naming its source"
  },
  {
   "field": "a facility for an unresolved string",
   "why": "a raw facility string never becomes a node on its own; it reaches one only through the alias table or a valid R-1 id. Unresolved lines are in t1_facility_review, not here",
   "unblocked_by": "an alias in config/t1_facilities.yaml"
  },
  {
   "field": "a barrel's route inside a system",
   "why": "the T-1 loses routing inside a filer's system; tracing would be proportional mixing labelled as observation (spec \u00a710.6)",
   "unblocked_by": "nothing in this family"
  }
 ]
}