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Given a maximally non-integrable 2-distribution ${\mathcal D}$ on a5-manifold $M$, it was discovered by P. Nurowski that one can naturallyassociate a conformal structure $[g]_{\mathcal D}$ of signature (2,3) on $M$.We show that those conformal structures $[g]_{\mathcal D}$ which come about bythis construction are characterized by the existence of a normal conformalKilling 2-form which is locally decomposable and satisfies a genericitycondition. We further show that every conformal Killing field of $[g]_{\mathcalD}$ can be decomposed into a symmetry of ${\mathcal D}$ and an almost Einsteinscale of $[g]_{\mathcal D}$.

Conformal Structures Associated to Generic Rank 2 Distributions on 5-Manifolds - Characterization and Killing-Field Decomposition