Is necessity to print nitrogen purged in the pack?

currently we are using the Nitrogen in the Food products while packing for the product freshness, or many reasons.
Does FSSAI says the E No of nitrogen should be printed on the LAbel of product?

Did you check regulations?

yes, but there is no clear information to print or not on the label, regulation says you can use for the product packing.
one more question is necessity to add the saem nitrogen as ingredient too?
I see many products in the market with nitrogen but no-one brand has written NItrogen as ingredient on the product label or etc.