Taking into account different business models, a CSD should be defined by reference to certain core services, which consist of settlement, implying the operation of a securities settlement system, notary and central securities accounts maintenance services.
Ag féachaint do shamhlacha gnó éagsúla a chur san áireamh, ba cheart TLU a shainmhíniú trí thagairt do sheirbhísí lárnacha áirithe, arb éard atá i gceist leo socraíocht, lena dtugtar oibriú córais socraíochta urrús le tuiscint, seirbhísí nótaire agus seirbhísí cothabhála do chuntais urrús lárnacha.