Is there a lower age limit for someone to be registered for an Extension Studies Course? Is there a lower age limit for someone to be registered for an Extension Studies Course? Where can I find the different nation categories? I want to take some Extension Studies courses: where can I find them? Posted by Phil Leage on October 31, 2019 in Yes, they need to be at least 15 years old. Share this article: 1 About Phil Leage