Seed materials, cell banks, pools of serum or plasma and other materials of biological origin and, whenever possible, the source materials from which they are derived shall be tested for adventitious agents.
Matični materiali, banke celic, zbiri serumov ali plazme in drugi materiali biološkega izvora, in kadarkoli je to mogoče, izvorni materiali, iz katerih se te snovi pridobivajo, je treba preskusiti na prisotnost naključnih snovi.