Ključne sestavine so tiste, ki so namenjene in bistvene za zagotavljanje zakonitosti in pravilnosti in so resnično bistvo projektov, ki jih podpira sklad, pomožne sestavine pa tiste, ki prispevajo h kakovosti sistema za upravljanje in nadzor in pomagajo zagotavljati, da sistem deluje dobro glede na svoje ključne funkcije.
Key elements are those designed and essential to ensure the legality and regularity and indeed the substance of projects supported by the Fund, ancillary elements those that contribute to the quality of a management and control system and help ensure that the system keeps performing well in relation to its key functions.