Multi-time scale-invariance of turbulence in a shell model

We relate the concept of multiscaling in the inertial range of turbulence to a hidden scaling symmetry. We deduce that the anomalous exponents of scaling laws are determined solely by the degree of time-scale homogeneity of the observed quantities. This yields a universal rule that includes the usual structure functions and Kolmogorov multipliers, and extends further to multi-time correlations and other multi-time properties of turbulent statistics.