Variable-speed-of-light (VSL) cosmology models in which either (i) the physical constants vary over time or (ii) the Lorentz invariance is broken locally have been proposed before. Ritz type models, a type of VSL, seems to explain some of the cosmological anomalies. Most interestingly, the Hubble law appears to be derived from the model's assumptions. Is the Hubble law always considered an axiom or can it be derived in typical cosmological models?