+
+Promotion to stable
+~~~~~~~~~~~~~~~~~~~
+
+An API's ``experimental`` status should be reviewed annually,
+by both the maintainer and/or the original contributor.
+Ordinarily APIs marked as ``experimental`` will be promoted to the stable ABI
+once a maintainer has become satisfied that the API is mature
+and is unlikely to change.
+
+In exceptional circumstances, should an API still be classified
+as ``experimental`` after two years
+and is without any prospect of becoming part of the stable API.
+The API will then become a candidate for removal,
+to avoid the accumulation of abandoned symbols.
+
+Should an ABI change, usually due to a direct change to the API's signature,
+it is reasonable for the review and expiry clocks to reset.
+The promotion or removal of symbols will typically form part of a conversation
+between the maintainer and the original contributor.