No acquisition and no universal clock return

This is the elementary no-return mechanism of En09-A En09. It does not exclude recovery of a separately declared code in another surviving factor.

The calibration labels are finite history or task labels. If distinct labels are all required to equal the time of one fixed readout event on positive branches, at most one can occur. Clock conditioning alone also supplies no unitary relational dynamics without the extra covariance and preparation hypotheses of En09-A.

The geometric coordinates $t,T$, the worldsheet, and the prescribed future relation survive the readout.