Regularization of casual workers requires Uma Devi eligibility and uninterrupted service against sanctioned posts, excluding court-protected engagements. Regularization of casual workers is directed under the Supreme Court ruling subject to DoPT conditions: only similarly placed casual workers who satisfy Uma Devi mandatory conditions, have worked against sanctioned posts for ten years or more as of the Uma Devi judgment, and whose engagement is not under court or tribunal orders may be regularized; eligible workers in Group D are to be regularized and subsequently merged into the MTS cadre pursuant to DoPT guidance, with Department of Expenditure concurrence.