In 1829, nearly 2000 hectolitres of Châteauneuf du Pape were sold outside the "département" (administrative region). Châteauneuf du Pape wines already enjoyed a considerable reputation.

In 1894, to ensure the quality of Châteauneuf-du-Pape wines, the wine growers set up the first "Syndicat Viticole" (Wine-growing syndicate) aimed at providing buyers with wines produced directly from grapes grown on their land and guaranteeing the best vintages by a specific Syndicate marking.

In 1911, the town council set up a commission of 34 wine growers to draw up a classification of Châteauneuf-du-Pape vineyard. The Syndicate was up with a view to obtaining the Châteauneuf-du-Pape Appellation of Origin, as set out in the 1919 law. Baron Le Roy de Boiseaumarié, a lawyer and wine grower was requested by his colleagues to undertake this mission : "I am perfectly willing to do so, but only on one condition, that you yourselves show an example of honesty and rigour".

The legal action undertaken by the Syndicate and its famous president resulted in the laying down of the regulations that govern the Châteauneuf-du-Pape Appellation and that have also served as a basis for others responsible for drawing up the statutes for guaranteed vintage wines (A.O.C.)

The Châteauneuf-du-Pape wine growers were the first to set themselves production guidelines. As a result of Baron Le Roy energy and expertise the boundary regulation and production conditions were confirmed by the "Cour de Cassation" or Court of Appeal on November 21, 1933. Although slight changes were made in 1936, 1966 and 1992, they are still in force today and guarantee the quality of Châteauneuf-du-Pape wines.