90(3)
Notwithstanding anything contained in sub-section (2), no employer shall, during the pendency of any proceeding in respect of an industrial dispute, take any action against any protected worker concerned in such dispute—
90(3)(a) by altering, to the prejudice of such protected worker, the conditions of service applicable to him immediately before the commencement of such proceeding; or
90(3)(b) by discharging or punishing, whether by dismissal or otherwise, such protected worker, save with the express permission in writing of the authority before which the proceeding is pending.
Explanation 1 For the purposes of this sub-section, a "protected worker" in relation to an establishment, means a worker who, being a member of the executive or other office-bearer of a registered Trade Union connected with the establishment, is recognised as such in accordance with rules made in this behalf.