acting as replacement for the Dean or President

http://www.ada.org/news/8827.aspx

“Censor of a Colegio Notarial” is just a Board Member (= miembro de la Junta Directiva) of one of the many Colegios Notariales of Spain. Basically this strange-sounding, old-fashioned term corresponds to “vocal” (Board member), it is actually the same, but for some obscure reason beyond my knowledge the Spanish notaries still use this term, of course also in their official legal apparatus, such as the Ley del Notariado from 1944.

The amount of Board members of the Spanisch Colegios depend on their size. Hence, you will find Colegios with just three Board Members (Decano-Presidente + Secretario + only one Censor), whereas others have up to five (see underneath). But every Board is made up of at least three members.

http://glosario.notariado.org/?do=terms&letter=C
censor
Persona integrante de la junta directiva de un colegio de notarios.



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Note added at 5 hrs (2013-08-09 13:25:52 GMT)
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Final (important) remark: My translation reflects the Spanish structure of Notaries public, in the UK and other English-speaking countries the situation may and do differ substantially. In the UK there is nothing comparable, as far as I know. This link applies specifically for the UK:

http://www.scrivener-notaries.org.uk/docs/Organisation_and_F...
D.1.2 The Notaries Society
The Notaries Society www.the notariessociety .org.uk is open to all notaries holding a faculty to practise in England and Wales, and Associate Membership to persons who have signified their intention to obtain the recognised post graduate diploma in Notarial Practice and to qualified Notaries Public practicing outside England and Wales. There are at present 866 notaries holding a faculty and practising certificate entitling them to practise in England and Wales of these there are 28 Scrivener Notaries. The rest are General Notaries. Of these, 878 are at present members of The Notaries Society including Associate Members.
D.1.3 The Society of Scrivener Notaries/ The Worshipful Company
of Scriveners
The Society of Scrivener Notaries of London www. scrivener -
notaries .org.uk is the professional body representing the interests of Scrivener notaries. The Society administers the London fidelity insurance scheme and the issue of certificates of remuneration in cases of disputed fees under delegated authority from the Court of Faculties



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Note added at 5 hrs (2013-08-09 13:26:50 GMT)
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From the Spanish “Reglamento Notarial”:
http://www.boe.es/diario_boe/txt.php?id=BOE-A-1944-6578

Artículo 318.
La Junta Directiva de cada Colegio estará integrada por un mínimo de tres y un máximo de nueve miembros. Estará compuesta necesariamente de un Decano-Presidente, un Censor y un Secretario. (…)
Artículo 326.
Será precisa para la válida constitución de la Junta la presencia del Decano, Secretario y, al menos uno o dos censores, dependiendo de si el número de los miembros de la Junta es de tres o más. El Decano y el Secretario podrán ser sustituidos por quienes legalmente corresponda.
Artículo 329
(…)
Los Censores actuarán como Vocales de la Junta y desempeñarán las funciones que el Decano les delegue y las demás previstas en el Reglamento.