The French agricultural professor and politician Joseph Capus (1867-1947) was a professor of agriculture. In 1924 he was elected as a deputy of the Gironde. His significant influence on French viticulture and the wine laws began with the Roquefort cheese, or with the whole of France moving "cheese scandal" in 1925 (see in detail under Appellation d'Origine Protégée ). Joseph Capus took this scandal to the occasion, which in the Bordeaux denounce the usual procedure, wine from any varieties without regard to the origin and produce by any method. Under his influence, in 1927, the law was set to specifications for the winemaking extended. It defined, among other things, that only those grape varieties could be used that are sanctified by loyal, old-established, local custom .
In this regard, had already in the 1920s Pierre Le Roy de Boiseaumarié (1890-1967) at his winery Château Fortia On the southern Rhône, important preparatory work was carried out in which, due to climatic and soil typical conditions, it borders the area of today's area Châteauneuf-du-Pape defined and defined the grape varieties for this wine. Thus, Capus pointed the right way and is therefore the godfather of the French origin SystemsAppellation d'Origine Protégée sometimes referred to as "la loi capus". In 1935, he and Pierre Boiseaumarié became the permanent expert body of the "Comité National des Appellations d'Origine" as a forerunner of today's institute INAO (National Institute of Appellations d'Origine).