From SOLO website:

"Upon successful completion of both exams, participants receive a two-year SOLO WEMT certification, a two-year AHA CPR certification, and a National Registry of Emergency Medical Technician (NREMT) certification. It is the responsibility of each student to find out how certification and licensure work in their state."

"...THE RESPONSIBILITY OF EACH STUDENT TO FIND OUT HOW CERTIFICATION AND LICENSURE WORK IN THEIR STATE..."

The reason I brought up this issue in the first place is that although it is relatively easy to get EMT training, providing medical care as an EMT is not a trivial thing. As an EMT you are considered a medical professional, albeit a very low level one, and are legally held to a standard of care. Each state sets standards and has requirements and If you use EMT skills without proper authorization you are risking serious liability issues.