Section 2(1)(iii) in The Karnataka Essential Services Maintenance Act, 2013
(iii)any other service or employment or class thereof connected with any matter with respect to which the State Legislature has power to make laws under List II of the Seventh Schedule to the Constitution and which the Government being of the opinion that refusal to work therein would prejudicially affect the maintenance of any public utility services or the public safety or the maintenance of supplies and service necessary for the life of the community or would result in the infliction of grave hardship on the community, may, by notification, declare to be an essential service for the purpose of this Act;