OPCC source data licences and attribution

OPCC package code and documentation
- Copyright: Lennon Li and OPCC contributors
- Licence: MIT

Statistics Canada National Address Register (NAR)
- Source: Statistics Canada, National Address Register
- Licence: Open Government Licence - Canada
- OPCC treatment: source-qualified postal association evidence; source and
  vintage are retained in release provenance.

Statistics Canada 2021 Census geography
- Source: Statistics Canada, 2021 Census geography products, including
  Dissemination Block / Dissemination Area boundaries and the Geographic
  Attribute File
- Licence: Open Government Licence - Canada
- OPCC treatment: geographic assignment and census-geography roll-up.

GeoNames Canadian postal-code points
- Source: GeoNames
- Licence: Creative Commons Attribution 4.0 (CC BY 4.0)
- OPCC treatment: separately identified supplementary postal-code point
  evidence; source date and attribution are retained in provenance metadata.

Restricted sources not redistributed by OPCC
- Canada Post postal products, PCCF, and PCCF+ are not ingested or
  redistributed as OPCC release evidence.
- Any maintainer-held licensed QA material is local, read-only validation
  material and is not included in the package, repository release artifacts,
  runtime cache, or contribution workflow.

Source-specific terms control if they conflict with this notice. OPCC publishes
or accepts a data layer only when its source terms permit the intended use and
redistribution.
