270. Witnesses may be called to give an account of facts of which they have personal knowledge, to give an opinion as an expert or to produce a document or other evidence.
Notaries and land surveyors cannot be called for the sole purpose of producing an authentic copy of an act executed en minute, unless the document has been alleged to be a forgery. Bailiffs cannot be called to testify about facts or admissions they may have become aware of in the course of notifying a pleading.