Pattern help

Making a Noro sweater. “Dec one st at neck edge of the next and every foll row until 30 sts rem”——- do I decrease every row or only at the neck edge?

Welcome to KnittingHelp!
Decrease every row at the neck edge. Decreases are on rows 1,2,3,4,5, etc until you get to 30sts.
You may be decreasing on knit rows and purl rows if that is your pattern stitch.
What is the name of your pattern?

Simply noro chambers sweater. Thank you