Employment to which this Act applies.

This Act shall apply to all employment under the Central Government or to any employment or class of employment which the Central Government being of opinion that such employment or class of employment is essential for securing the public safety, the maintenance of public order, health or sanitation, or for maintaining the supplies or services necessary for the life of the community, may, by notification in the Official Gazette, declare to be an employment or class of employment to which this Act applies.