Not for points Spanish to English Other Education / Pedagogy

I am translating a university transcript from Spain and a footnote reads:

En la Universidad de Salamanca, de acuerdo con la legistación universitaria española, 1 crédito NO ECTS equivale a 10 horas de clase.

I've translated it as

"At the University of Salamanca, in accordance with Spanish university legislation, 1 NON ECTS credit equals 10 hours in class."

That is the best I have come up with but I'm wondering if NO is actually an acronym I'm not familiar with. I couldn't find out while researching ECTS (European Credit Transfer and Accumulation System).