2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47860We explain why the time ordering in the definition of non-diagonal parton distributions can be omitted and discuss the physics implications.4 pages, 2 figures, LaTeX2e. Talk given at the International Workshop on Deep Inelastic Scattering and QCD (DIS 98), Brussels, BelgiumHigh Energy Physics - Phenomenologytext