"El Gobierno garantiza al Vaticano que no tocará los acuerdos de la Santa Sede. "
The Goverment guarantee the Vatican that the (current) accords (with the Vatican) will not be touched.
Socialist goverment of Spain is doing things that the Vatican does not like (gay weddings, more freedom to abort). It could be that the Goverment can like to change the accords, due to this fatcs.
But the Goverment is now assuring this will not affect the current accords with the Vatican.
Saludos