Green card from csez and gst

If your unit is within SEZ Then only you can claim the status of SEZ  Unit. Supplies to SEZ are interstate supplies and also zero rated  subject to the execution of LUT with the jurisdictional GST Authorities by the supplier. If you are a SEZ unit and you have a valid LOA, Your status  as per GSTN Website is SEZ UNIT. IF YOU ARE A 100% E.O.U , YOU WILL NOT BE ELIGIBLE FOR THE BENEFITS OF SEZ UNIT. Green card is mainly used for transporation of goods if any body is carried out any checks during the movement of goods to establish our identity as an Export oriented unit

Normaly Green card is issued along with the Letter of Approval. Be a green card holder than not to be

And what exactly were you told when you were issued?

I'm glad @ JOJY THOMAS was able to answer your question. I absolutely agree with his answer. The green card gives huge privileges. About five million people enter the drawing annually, and only 55,000 wins. That means that the chance of winning is about 1.1%. However, I decided to try my luck. That's why I applied for a green card at usa-green-card.com for the annual green card lottery. It wasn't easy to win, but I finally got my legal permanent residency in the United States. I feel so lucky and so thankful for the U.S. green card!