The second ALADIN Memorandum of Understanding was signed on May 31st 2001. It was valid for four years and a half, till the end of November 2005. The main changes were :
an enlarged definition of the ALADIN partnership, with three levels of "rights versus duties" : Full Member, Associated Member, User;
more precise guidelines for the commercial use of ALADIN products;
stricter rules for the registration of the manpower dedicated to ALADIN;
creation of a Technical Cooperation Standing Committee (TCSC) of for members (Météo-France, a LACE representative, a SELAM representative, a representative of the other partners), in charge of the routine project coordination for technical issues.