By way of derogation from the provisions of articles D. 1221-6 to D. 1221-8, an order of the Minister for Health lays down the conditions under which, in order to meet overriding therapeutic needs or to take account of the rarity of certain erythrocyte blood groups, labile blood products for direct therapeutic use, prepared from blood or blood components which have not undergone all the tests and analyses mentioned in the aforementioned articles or for which the results of some of these tests and analyses are positive, may be used.