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We calculate analytically the distributions of "level curvatures" (LC) (thesecond derivatives of eigenvalues with respect to a magnetic flux) for aparticle moving in a white-noise random potential.  We find that the Zakrzewski-Delande conjecture is still valid even if thelowest weak localization corrections are taken into account. The ratio of meanlevel curvature modulus to mean dissipative conductance is proved to beuniversal and equal to $2\pi$ in agreement with available numerical data.Comment: 12 pages. Submitted to Phys.Rev.

‘‘Level curvature’’ distribution for diffusive Aharonov-Bohm systems: Analytical results