2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/61121We classify the normal CR structures on $S^3$ and their automorphism groups. Together with [3], this closes the classification of normal CR structures on contact 3-manifolds. We give a criterion to compare 2 normal CR structures, and we show that the underlying contact structure is, up to homotopy, unique.Latex2.09, 23 pages, corrected footnotes and references, revised acknowledgementsDifferential Geometry53A40, 53C25, 53D10text