One nation one month notice period when?

Talking about the new obsession with one nation and one xxxx, a thing that actually matters to us fellow employees is one nation one month notice period. This rule is to ensure the notice period is of max one month and not a day beyond it. I know many companies have a 2 week policy and lots of companies in the west have this policy (including startups). But why do a lot of us have to suffer because of 2 and 3 month notice periods when most of the recruiters aren't willing to wait for so long? Also the irony, all these companies want immediate availability. It's high time we make this a law, Modi pls pass the bill for one nation one month notice period.