jurisdiction_residual_gate
A policy set governs this number and names its own hole. Raised by GET /v1/contacts/{id}/dialability and by POST /v1/calls when the resolved policy carries a residual_gate nothing has cleared - a requirement the record cannot evaluate: a state registration, permit, bond or message filing (operating_authority); a live-human-first or natural-voice condition (call_architecture); or a fact about the callee we do not hold (evidence).
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/jurisdiction_residual_gate",
"title": "…",
"status": 409,
"detail": "…",
"instance": "/v1/…"
}