You maintain a current law license, which requires having passed the bar once, continuing education requirements, and the absence of professional mal-, mis-, or non-feasance sufficient to lose that license. Taken together, the requirements are ongoing, though some individual elements are one-time.
Not getting disbarred hardly counts as an ongoing requirement in all but the most meaningless sense of the word.
https://www.ordemengenheiros.pt/pt/a-ordem/colegios-e-especi...
Problem is people calling themselves engineers without being one.
It would be wonderful to have an equivalente for computer science. You do it right after graduating, study for it once and you're done. Not leetcoding for 6 months every other year for life which is ridiculous waste of time.
Software engineers making 150K with only a four year degree and some leetcode have nothing to complain about. Take homes? Whiteboards? Cry me a river. Try to pass the bar or get through residency instead.