Actually, when applying for "green card" and you CAREFULLY READ the instructions for "Application for immigrant visa and Alien registration" (FORMS DS 230 part i and part ii), please be very careful with part ii, "sworn statement" which states specifically: (Section 40 (e).. )
Aliens within the following classifications are INELIGIBLE TO RECEIVE A VISA
. Do any of the following classes apply to you?
(e)..who is a healthcare worker seeking to perform such work without a certificate from the CGFNS or from an equivalent approved independent credentialing organization. (
empahsis is mine)
seemsquite clear that you are signing an oath to the extent that you are presenting yourself as someone who will seek work as a nurse and will have a CGFNS C.E.S. validating your course curriculum as equivalent to US requirements. I suggest you download (PDF FILE) this application form and read that section carefully as you are signing an oath!
Regardless of state requirements, it appears that at a MINIMUM you must have CGFNS Course Evaluation (CES) as part of your application for green card status/visa prior to working as a nurse in the USA.