The upgrading of offspring to the main section of breeding books should only be allowed through the female line, except in the case of equine species.
Níor cheart go ndéanfaí óga a uasghrádú isteach i bpríomhchuid na bpórleabhar a cheadú ach amháin tríd an líne bhaineann, ach amháin i gcás na speiceas eachaí.