The law states that all applicants must meet all requirements of Federal plus PNP during the process. If your circumstances leads to change in score (increased or decreased) you must inform OINP.Thanks for ur contribution. However my question was maintaining 400 crs after nomination and I learnt it's no longer a requirement during Federal processing as I have 600 score more.
But during oinp processing I must maintain 400 min score requirement(I'm not an ict professional).
The reason is that Federal will verify information you provided to them with those provided to OINP and they both shall match. If it doesn't then your case and either be delayed or even result in rejection.
However, any change in circumstance after PR application shall only be informed to IRCC and not to OINP.
I hope this will clear things.