According to § 38 Abs 2 GGBV a dangerous goods recurrent training must take place within 24 months starting from the issue date of the certificate. However, if the recurrent training is completed within the final 6 months of validity of previous training, the period of validity extends from the date on which the recurrent training was completed until 24 months from the expiry date of that previous training. In this special case Austrian national law is less restrictive than the international requirements are. According to ICAO Technical Instructions recurrent training needs to be completed within the final 3 months of validity of previous training (Part 1, Chapter 4, 4.2.3)