The content and scheduling of a TAPI release is described at TAPI Roadmap 2023 page.
Any major TAPI release (vX.Y) must be associated to a TAPI RIA version (vA.B)
The development of TAPI RIA Requirements and Use Cases guides the development of TAPI model (from Requirements and Use Cases to Model).
When a meaningful/identified/consistent set of features have been consolidated in RIA discussions, an intermediate TAPI releases (v.X.Y.Z) can be delivered.
Process to be followed for the delivery of a TAPI Major Release
A pre-release major version is declared to be "ready for review" at a regular TAPI call.