There's a few more hoops to jump through for FACEP. After being out for 3 years, I think they have a list of 11 or so items and you have to check off 3 (research, committee work, resident teaching, etc). I'm in the process of filling out the paperwork now.
Be active, life, honorary, or international members for three continuous years immediately prior to election and must have been certified in emergency medicine at the time of election by the American Board of Emergency Medicine, the American Osteopathic Board of Emergency Medicine, or in pediatric emergency medicine by the American Board of Pediatrics. Maintenance of Fellow status requires continued membership in the College. In addition, the following requirements demonstrating evidence of high professional standing must be met by candidates some time during their professional career prior to application.
At least three years of active involvement in emergency medicine as the physician's chief professional activity, exclusive of training, and;
Satisfaction of at least three of the following individual criteria during their professional career:
active involvement, beyond holding membership, in voluntary health organizations, organized medical societies, or voluntary community health planning activities or service as an elected or appointed public official;
active involvement in hospital affairs, such as medical staff committees, as attested by the emergency department director or chief of staff;
active involvement in the formal teaching of emergency medicine to physicians, nurses, medical students, out-of-hospital care personnel, or the public;
active involvement in emergency medicine administration or departmental affairs;
active involvement in an emergency medical services system;
research in emergency medicine;
active involvement in ACEP chapter activities as attested by the chapter president or chapter executive director;
member of a national ACEP committee, the ACEP Council, or national Board of Directors;
examiner for, director of, or involvement in test development and/or administration for the American Board of Emergency Medicine or the American Osteopathic Board of Emergency Medicine;
reviewer for or editor or listed author of a published scientific article or reference material in the field of emergency medicine in a recognized journal or book.
That's right off the website, so the formatting is a bit wonky.