arpadveress 
21/2010 NFGM decree defines it. 3 levels** of Ex personnel competency exist:
– technician
– maintenance
– supervisor*
* if already member of technical chamber and registered as designer, you may deliver designs accordingly (if you’d like to see the tag explosion protection next to your name: you may apply for G19)
** further education, final activity strongly depends on basic education
Note:
– other decree says it shall be refreshed in every 5 years maximum.
– only state approved training centres are authorized
WHAT ABOUT OTHER COUNTRIES?
keep up good work!
Arpad
exprofessional.com
