The three uncertainties share an upstream calibration. Treating them as independent measurements would misstate the uncertainty of a product, ratio, or derived constant. Correlation must remain attached when those references are propagated into further expressions.

The stated errors also exclude an independently estimated theory-discrepancy contribution. They quantify sensitivity to the supplied input under the adopted defining relations. They do not establish how accurately nature follows those relations or whether an omitted realization effect is negligible.

This calibration organization is a reproducibility result for the constants program. It allows different manuscripts to use the same reference set and exposes incompatible mixtures of input editions. The October source date identifies the recorded construction, rather than a new laboratory determination of fundamental measures or an independently established minimum interval in nature.