Sorry, but "personeria" gives me a problem...

means "proxy" (LAm Jur) So recognized through/(by means of) proxy for legal actions 271. ¡Buena suerte, Joao Crus!
Re.: Collins Spanish Dictionary, ISBN 0-00-470295-6

"Persona jurídica" is an "artifical person" "body incorporate" "LEGAL person", i.e.not a private individual, or "persona natural"

"Personería" is the "state of being an legal, artificial person.

I assume the sentence reads:

la sociedad XXX, recognised as a Legal Person under section/articles etc....

En cumplimiento del Artículo 3 (3) del Acuerdo Fundamental entre el Estado de Israel y la Santa Sede
(también conocido como el "Acuerdo de Personería Jurídica")

Pursuant to Article 3 (3) of the Fundamental Agreement between the State of Israel and the Holy See
(also referred to as the "Legal Personality Agreement")

It is the legal certificate that acknowledges the "existence" of an educational institution. The equivalent to a person's identification card, only this is for an institution

"personería" is the authorization to operate given to institutions who fill certain requirements, so it has a number and is a form issued by authority that allows this institution to start with its business