Explanation:

No workman (other than a badly workman or a casual workman) whose name is borne on the muster rolls of an industrial establishment to which this Chapter applies shall be laid-off by his employer except 140[with the prior permission of the appropriate government or such authority as may be specified by that government by notification in the Official Gazette (hereafter in this section referred to as the specified authority), obtained on an application made in this behalf, unless such lay-off is due to shortage of power or to natural calamity, and in the case of a mine, such lay-off is due also to fire, flood, excess of inflammable gas or explosion].