Proposal for a new Mossbauer experimental test of special relativity

It has been shown that the existence of nonrelativistic terms proportional to c(-2) (c is the light speed) in any electromagnetic experiment is forbidden by the general properties of admissible space-time transformations. Therefore, the validity of Einstein's postulates properly could be checked only in experiments looking for the terms proportional to c(-3) The scheme of a Mossbauer experiment which would be able to reveal the third order terms is suggested. It repeats the scheme of the Champeney experiment with application of a resonance method of registration for recoil-free radiation.