The French agricultural professor and politician Joseph Capus (1867-1947) was a professor of agriculture. In 1924 he was elected to the Gironde department. Its significant influence on French viticulture and on wine laws began with Roquefort cheese, or with the "cheese scandal" that moved the whole of France in 1925 (see in detail under Appellation d'Origine Protégée ). Joseph Capus took this scandal as an occasion, which in the Bordeaux To denounce usual practice, wine from any varieties without considering the origin and to manufacture with any methods. Under his influence, in 1927 the law on requirements for the winemaking extended. Among other things, it defined that only those grape varieties that were sanctified by loyal, old-established, local custom should be used .
In this regard, Pierre Le Roy de Boiseaumarié (1890-1967) at his winery Château Fortia important preparatory work was done on the southern Rhône, in which, due to climatic and soil-typical conditions, the limits of today's area Châteauneuf-du-Pape and defined the grape varieties for this wine. So Capus pointed the right way and is therefore considered the godfather of the French origin SystemsAppellation d'Origine Protégée, which is sometimes referred to as "la loi capus". In 1935, he and Pierre Boiseaumarié, the permanent committee of experts, became the "Comité National des Appellations d'Origine" as the forerunner of today's institute INAO (Institut National des Appellations d'Origine) founded.