Nobody has to do online training. Seeing that it gets done is the responsibility of the supervisor, and it must be well documented. See also Protection to read more about protective devices in general. All users of radioactive materials are required to attend a 3 hour Radiation Safety course which is scheduled at regular times twice per month, and which can be given at other times for those with difficult schedules. See REM training schedule , and see the Rad Safety Manual for general information.
Training is also available for users of other radiation producing devices.
If your work activities do not include laboratory use of chemicals, you need HazCom training every year. If you took CHM 605 or any other Chemical Hygiene Plan Training at one time, but are now engaged no work involving laboratory use of chemicals, you are in the number 2 case above. On a global scale this is fairly accurate.