CHICAGO — Measurement Quantization specifies a common acceleration scale before evaluating galaxy rotation curves. The original source calculations use a frozen nominal value of 1.20040492178 × 10⁻¹⁰ metres per second squared. The corrected relation draws on the System Frame expansion rate, the invariant MQ coefficient and the defined speed of light; it does not adjust the scale separately for each galaxy.

The scale controls where the proposed gravitational realization law departs appreciably from the Newtonian baryonic response. At high baryonic acceleration the realized response approaches that of the adopted stars-and-gas source. At lower acceleration, the same law gives an enhanced response relative to that source. Figure 1 separates the upstream specification from the downstream galaxy comparison.

Fixed before galaxy fitting does not mean detached from empirical input. The later shared-input calibration depends on the measured fine-structure constant and cosmic microwave background temperature through the MQ coefficient and age reconstruction. That reconstruction also retains an unverified absolute temporal-normalization premise. The quoted input uncertainty does not include that premise or unquantified model discrepancy.

The original frozen nominal scale and the later shared-input result must remain distinct. The current gravity overview reports 1.20037(33) × 10⁻¹⁰ metres per second squared under its stated calibration. This small numerical revision is separate from correcting the expansion-branch attribution. The branch correction retains the nominal value and original galaxy results; recalibrating shared inputs produces a slightly different acceleration.

For an unchanged baryonic source, the later calibration decreases positive predicted circular speeds by less than 0.000750 percent under the stated law. This is an analytic sensitivity bound. It does not mean the catalog residuals, error statistics or probabilities have been recomputed with the revised scale.

The empirical radial acceleration relation predates this MQ construction. Its fitted characteristic scale is conditioned on the adopted baryonic reconstruction and statistical treatment. Numerical proximity to that regression parameter cannot by itself establish that the two quantities are the same observable or assign a probability to MQ. The relevant downstream test compares the fixed prediction with externally inferred circular velocities.

The companion Brief supplies the corrected relation, units, a numerical example, the original and revised scale histories, and a chart of velocity sensitivity. It also identifies an accessible source-version discrepancy so journalists can distinguish the current correction from the older attribution still visible in the longer preprint.

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