I am eating Spicy Shrimp Roll by World Sushi Express and it says that there 4 gm fat/ 10 rolls. Somehow I find this hard to believe as there is avocado and mayo in this..
http://www.worldsushiexpress.com/menugourmet/spicyshrimp.htm
Yes, that is a legal nutritional NLEA. I don't see anything wrong with it. The law allows for you to formulate into a nutritional database with known values for standard ingredeints OR to sent the food out to a testing lab which can be VERY VERY expensive! I bet it was developed using a standard nutritional database software.
See this one:
http://www.esha.com/
This is the one I use all the time to develop new NLEA nutritional labels with. I am betting that is what they used.