I don't speak Spanish, so post 70 is of no use to me. The link in post 73 won't load, probably because the server is being hammered as the news gets around.
I have to trust the folks who can translate and who have a presence on the ground to relay the news. No single source, of course -- but when there's a preponderance of sources, that's the way I lean.
You’re not missing much by not reading the Spanish original. As always, Fidel’s a verbose little windbag, and it takes him several paragraphs to come to the point:
...les comunico que no aspiraré ni aceptaré- repito- no aspiraré ni aceptaré, el cargo de Presidente del Consejo de Estado y Comandante en Jefe.
[I communicate to you that I will not seek nor will I accept—I repeat: I will not seek nor will I accept the position of President of the Congress and Commander in Chief.]
That comes right from the official Granma Cuban propaganda site. The link in 73 will just get you what I posted in 70.