Structural Invariance: A Link Between Chaos and Random Matrices
  The concept of structural invariance previously introduced by the authors is used to argue that the connection between random matrix theory and quantum systems with a chaotic classical counterpart is in fact largely exact in the semiclassical limit, holding for all correlation functions and all energy ranges. This goes considerably further than the usual results obtained through periodic orbit theory.These results hold for eigenvalues of bounded time-independent systems as well as for eigenphases of periodically kicked systems and scattering systems. 
F. Leyvraz and T.H. Seligman (Laboratorio de Cuernavaca, Instituto de   Fisica, University of Mexico, Mexico)