Sir(s),
When the last enhancement in wage ceiling was done in the year 2010 w.e.f. 01/05/2010, the draft intention notification dated 26/02/2010 was published in the Gazette of India Part-II, Section -3, sub-section 1, Extraordinary dated 27/02/2010.
I hope, if I am not mistaken, your goodself may confirm the same from appropriate office of ESIC, if otherwise desired.
With regards;
Harsh Kumar Mehta