I have been a pracicing engineer for over 40 years. I have attended MANY seminars and workshops over the years. Some were great and others useless. I try to attend seminars that are relevant to specific work that I do. Sometimes I go to numerous seminars per year and sometimes it may be 2 or 3 years before I find a useful seminar that would help me with my engineering work. Required continuing education would require me to attend (and spend $) on seminars not useful to me. I would think a professional engineer can read professional magazines and research any topic on the internet that he/she would need. I am not in favor of REQUIRED continuing education.