Last I checked you could challenge the exam if you have been licensed for at least three years. You will also need to know massage and manicuring (Spa nails, I believe)... If I were you, I'd "Google" CIDESCO, and see where their US web site is. The information can be found there.
The closest campuses to you are in Houston, TX and San Francisco, CA that host a week long preparatory class and offer the examination. When you purchase this course, the text books and a schedule of the week long class is sent to you so you will know what to study and prepare for. If you would like more information, please don't hesitate to contact me direct. Shelly Simpson CIDESCO