Clock calibration and continuation

Nontrivial dictionary labels may be calibrated as history or task labels and read at one later event. They are not all declared to equal the time of that same event. If distinct calibrated labels must equal the coordinate of one fixed reading event on every positive branch, only one label can occur IB.

Neither clock is returned. The geometric coordinate $t$, the host time $T$, and the prescribed future relation remain. No relational unitary evolution follows from clock extraction alone; En09-A's additional stationarity and clock-covariance hypotheses are not assumed here.