Explanation:

The state government recently invoked the Rajasthan Essential Services Maintenance Act (ESMA) on Rajasthan State Road Transport Service Corporation (RSRTC) ahead of a proposed strike by Rajasthan roadways employees,

RSRTC's services have been declared as most essential for a period of three months after the invocation of the Act

The Essential Services Maintenance Act (ESMA) was enacted in 1968, to maintain “certain essential services (which if obstructed would) affect the normal life of the community”.

Services that fall under this category:

Services related to public conservancy, sanitation, water supply, hospitals or related with the defence of the country are considered essential.

 Any establishment dealing with production, supply or distribution of petroleum, coal, power, steel and fertilizers also falls under the essential services category.

Apart from this, any service in connection with banking can be subject to ESMA.

Communication and transport services and any government undertaking related to the purchase and distribution of food grains are also subject to this act.

The employees can't even refuse to work overtime if their work is considered necessary for the maintenance of any of the essential services.