(5)A private limited liability company may be a single-member company from the time of its formation, or may become one because its shares have come to be held by a single shareholder. Pending the coordination of national provisions on the laws relating to groups, Member States may lay down certain special provisions and penalties for cases where a natural person is the sole member of several companies or where a single-member company or any other legal person is the sole member of a company. The sole aim of this power is to take account of the differences which exist in certain national laws. For that purpose, Member States may in specific cases lay down restrictions on the use of single-member companies or remove the limits on the liabilities of sole members. Member States are free to lay down rules to cover the risks that single-member companies may present as a consequence of having single members, particularly in order to ensure that the subscribed capital is paid.