Section 22 of the Industrial Disputes Act
Section 22 of the Industrial Disputes Act provides that a strike commenced without giving 14 days' notice shall be illegal. However, this provision applies to establishments engaged in public utility services. A public utility service means a service that should not be interrupted, or interruption of which will affect the public's life. Examples include public transport services like railways, work connected with ports, postal and telephone services, supply of electricity, power, water to the public, banking, and other services declared as public utilities by the government. Therefore, if your establishment falls under a public utility, you can declare the strike to be illegal.