—(1) Such an agreement as is mentioned in section 111 shall not affect the amount of, or any rights or remedies for the recovery of, any costs recoverable from the client by, or payable to the client by, any other person, and that person may, unless he has otherwise agreed, require any costs payable or recoverable by him to or from the client to be taxed according to the rules for the time being in force for the taxation of those costs.
(2) Notwithstanding subsection (1), the client shall not be entitled to recover from any other person, under any order for the payment of any costs which are the subject of the agreement, more than the amount payable by the client to his own solicitor or law corporation under the agreement.
(3) Such an agreement shall be deemed to exclude any further claim of the solicitor or law corporation beyond the terms of agreement in respect of any services, fees, charges or disbursements in relation to the conduct and completion of the business in reference to which the agreement is made, except such services, fees, charges or disbursements (if any) as are expressly excepted by the agreement.
(4) Subject to the provisions of this Part, the costs of a solicitor or law corporation , in any case where there is such an agreement as is referred to in section 111, shall not be subject to taxation nor to the provisions of section 118.
(5) A provision in any such agreement that the solicitor or law corporation shall not be liable for negligence, or that he or the law corporation shall be relieved from any responsibility to which he or the law corporation would otherwise be subject as a solicitor or a law corporation, shall be wholly void.