9. A member of the Order carrying on professional activities within a partnership or joint-stock company must, to be authorized to carry them on within that partnership or joint-stock company, provide and maintain, by insurance contract or specific rider, or by suretyship contract, coverage for the partnership or joint-stock company against the liabilities of the partnership or joint-stock company arising from fault on the part of the member in the practice of the profession within the partnership or joint-stock company.