The provisions in relation to the illegal strikes and lock-outs are given under :

Under the Industrial Disputes Act, 1947, the provisions regarding illegal strikes and lock-outs are contained in Section 24. This section mandates that a strike or lock-out is considered illegal if:

• It is commenced or declared in contravention of Section 22 (specific to public utility services) or Section 23 (general prohibition during pendency of proceedings).
• It is continued in contravention of an order made under Section 10(3) or Section 10A(4A) by the appropriate government.

Other sections mentioned:
Section 22: Prohibits strikes and lock-outs in public utility services without proper notice.
Section 23: Provides general prohibitions against strikes and lock-outs during the pendency of conciliation, arbitration, or adjudication proceedings.
Section 29: Prescribes the penalty for breach of a settlement or award binding under the Act.