Notice of changes in minimum wages - Is there any formality to do under sec 9A? Of ID Act?

When govt changes minimum wages. Is there any formality to do under sec 9A? Of ID Act?
Appreciate your reply, Y/N, with reason. Look forward for your responses.

Dear Vyas,
The " change in service conditions" as contemplated u/s 9-A of the ID Act, 1947 and enumerated in Schedule IV is only such changes effected by the employer at his own will and which are in fact disadvantageous to the employees or results in relatively adverse conditions of service .
In this perspective, how can you come to the conclusion that change in the existing minimum rates of Wages of employees revised as per the orders passed by the appropriate Government under its statutory power would be to the disadvantage of the employees covered by the Minimum Wages Act, 1948?

Dear Friend
Changes in minimum wages does not come under sec 9A of the ID Act. The apporpriate Govt makes notice prior to such change through Gazette.