How is it possible to receive a single approval email for all lines from requisition?

In approval autority constants I activated 01 (Employee) and 06 (Commodity), I know that commodity is for line level, but for a requsition that contains many lines I dont want receive emails for each line, inclusive for lines with articles that aren't in set commodity. It's possible to set receive emails or have to modify worflow K43E08? I want one approval email for one requisition. Thank you!