The second ALADIN Memorandum of Understanding was signed on May 31^st 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.