Regarding new announcement

1)Sir SEBI announce regarding P note ,what it is?
2)According to new regulations now brokers​ shouldn’t use investors amount in their trading account which results in decrease in exposure limits so what it is?

These announcements are more to do with clamping down the use of ‘Participatory Notes’. P notes are used by offshore entities and does not really concern retail participation.

Do check the new article, which explains this in detail.