Iceman,
I looked that website over, and could not find any reference as to who the author was, or what affiliation they had with any organization (a bit odd). I noticed that they attempted to provide general information about many different Taekwondo organizations (Kukkiwon, WTF, ITF, A.T.A., etc), and they used the logos from those organizations. I wonder if they had permission to use those logos (I doubt it). I tend to be skeptical about an alleged authority on Taekwondo who calls a Dojang a "Dojung." The phonetic spelling of Sabeom (사범

has created many translations, but to use "Sabam" is completely the wrong vowel.
I think I wrote something about this topic of titles in another thread awhile back, but to the best of my knowledge, the Kukkiwon has nothing to do specifically with titles such as "Jokyo" 조교 (Jo-kyo-nim: assistant) Kyosa 교사 (Kyo-sa-nim: Instructor) or "Sabeom" 사범 (Sa-beom-nim: Master). These titles, along with the permission to assist instruction, teach classes, or open a school, comes from your Grandmaster (unless a person goes off independently, and teaches without permission or authority). If your teacher is legitimate, then your title and authority to teach is probably legitimate.
Check the entire Kukkiwon website. Unless I am mistaken, you will find no mention of the title of Sabeom at all. You will find no requirements listed for teaching, opening a school, or anything other than
BLACK BELT DAN RANK. There is one mention of the term Kwanjangnim, but as I recall, it is a vague reference to recommendation for promotion. Technically, anyone who heads an organization is a Kwanjang (Dean of schools) by default.
If that person's rank, and organization is not recognized by the Kukkiwon, then any Sabeom title, or any Dan rank within that organization is based solely on the authority (if any) from the Kwanjang. However, if that person's rank and organization is recognized by the Kukkiwon (example: Sr. Grandmaster Edward B. Sell, Kukkiwon 9th Dan, Kwanjangnim of the U.S. Chung Do Kwan Association), then every instructor's title within that organization carries the backing of the Kukkiwon without specifically being certified from the Kukkiwon.
Many Koreans of the Kwan era, scoffed at the notion that they need "Kukkiwon permission" to teach or hold their rank. They note that they were a high ranking Dan and Master Instructors before the Kukkiwon was even created, and they get their permission from their own teacher who is authorized through direct lineage of one of the five original Kwans.
Keep in mind, the recent improvements in organization at the Kukkiwon, and opening up training and certification to Black Belt instructor's around the world have made instructor courses (hence certification) from the Kukkiwon a reality. However, to open a Taekwondo Dojang in Korea might require the permission of the Korean government as well as the Kukkiwon, but outside of Korea, permission rarely extends beyond that of your own Kwanjang. Times are changing, and with all of the imposters, it might be good thing to have teaching credentials required by the Kukkiwon above and beyond Dan rank so people learn that there is a difference. However, I know of no such requirements outside of Korea as of yet.