This defines Colissimo product codes in exception which have to be replace just before the call of Colissimo Web Service. Generally speaking, the choice of a product code is done in this order : 1) the code for a shipping method as defined in referal, 2) the code given by Colissimo for a pickup location, 3) the code manually forced in meta box order, 4) optionnally if still null in meta box, the code defines in settings for France, Outre mer, International, 5) and finally the exception code rule which has the greatest priority. 