An EFFA Flycasting Instructor is certified as a highly qualified instructor which could master all the demands of the Flycasting Instructor Test.
This test consists of a practical part (casting limits) and a theoretical part with questions covering the substantial flyfishing knowledge. A serious preparation is neccessary to pass the exam. Average candidates usually prepare two years for the test.
Here you will find an explanation how the "holding of 20 m of fly line incl. leader in the air" is tested.