Dates in F&O Margin Calculator denotes what?

In Zerodha F&O Margin Calculator,it is seen as below;
BANKNIFTY contracts allowed for trading
7.2.24 NRML 45900 to 46100
14.2.24 NRML 45700 to 46300
Does this mean that we can buy BN options with the range from 45900 to 46100 upto7.2.24
And we can buy BN options in the range from 45700 to 46300 upto14.2.24(from 8.2.24 )…
(Option Selling allowed for any range always at all times )

Advance Thanks for Reply.
K V Manoharan …

For 07th feb expiry you can trade in the range of 45900 to 46100 . For 14th Feb expiry you can trade in the range of 45700 to 46300.
You can refer the kite order window for more precise information on ranges allowed.

thanks