Where, taking into account the situation of the securities markets in the host Member State, the activities of a CSD have become of substantial importance for the functioning of the securities markets and the protection of the investors in that host Member State, the competent authority of the home Member State and of the host Member State and the relevant authorities of the home Member State and of the host Member State shall establish cooperation arrangements for the supervision of the activities of that CSD in the host Member State.
Agus cás na margaí urrús sa Bhallstát aíochta á chur san áireamh, má tharlaíonn sé go bhfuil tábhacht shuntasach ag baint le gníomhaíochtaí taisclainne lárnaí urrús ó thaobh na margaí urrús a fheidhmiú agus na hinfheisteoirí a chosaint sa Bhallstát aíochta sin, bunóidh údarás inniúil an Bhallstáit bhaile agus údarás inniúil an Bhallstáit aíochta agus údaráis inniúla an Bhallstáit bhaile agus an Bhallstáit aíochta socruithe comhair chun maoirseacht a dhéanamh ar ghníomhaíochtaí an TLU sin sa Bhallstát aíochta.