How can HRD ministry raise the bar for IIT entrance when they dont have uniform educational board structure placed in India for markings?

How can HRD ministry of India raise the bar for IIT entrance when they dont have uniform educational board structure placed in India for markings?...yes, here I am raising the point of 80% mandatory marks obtained in 12th standard. If we go by CBSE or ICSE board it is easy and common to obtain this much amount of marks but when we go by Bihar, UP, MP or Rajasthan board then it is not only extreemly difficult but also impossible to obtain 80% marks. Example: in UP borad, student gets listed in merit list after 80% marks. I am very surprised by HRD ministry's step. Even these regional educational board (Sarkari by nature as usual) has not even put their points up because they dont have anything related with it. They are getting salary by Govt at time which is enough for them. Ultimately it is the regional Students and talents is gonna be suferer. Please raise this issue at max and support those student who somehow do not get access to study in those high scoring educational board (whose colleges charges excessive amount of fees).