50 and under need to register?

What are the rules regarding the age of Taiwanese men (who have already completed their mandatory military service) who need to register in case they need to be called up to serve? I was told 50 and under, but then I heard the age was bumped up.

I was just researching the same thing because I’m thinking of moving back to Tainan. Here’s what I found, which is a relief.

https://www.moi.gov.tw/english/News_Content.aspx?n=8354&s=124869