I am from Mexico and my 601A waiver got approved. When I cross the border, do I simply show my approval notice?

Q: Do I show the approval notice when I travel between the USA and Mexico? A: Congratulations. You have already overcome one of the biggest obstacles in your path to get an Immigrant Visa. You will have no issues crossing the border. You are a Mexican citizen and all you need to show if asked is your Mexican passport and document as required by your country to grant access at...