Under the conditions defined by the Articles of Association, responsibility vis-à-vis third parties for centralising subscription and redemption orders for units of the société de libre partenariat is entrusted either to the manager, or to the portfolio management company, or to the custodian, or to an investment services provider other than a portfolio management company authorised to provide one of the services mentioned in Article L. 321-1. The entity to which this responsibility is entrusted shall have appropriate and sufficient resources to perform this function.