Due to significant ambiguities in the articles with certain terms and concepts and even more so to the rapidly developing nature of war and military technology, the original articles had to be revised and expanded, largely at the Second Geneva Conference in 1906 and Hague Conventions of 1899 and 1907 which extended the articles to maritime warfare. The 1906 version was updated and replaced by the 1929 version when minor modifications were made to it. It was again updated and replaced by the 1949 version, better known as the Final Act of Geneva Conference, 1949. However, as Jean S. Pictet, Director of the International Committee of the Red Cross, noted in 1951, "the law, however, always lags behind charity; it is tardy in conforming with life's realities and the needs of humankind", as such it is the duty of the Red Cross "to assist in the widening the scope of law, on the assumption that…law will retain its value", principally through the revision and expansion of these basic principles of the original Geneva Convention.