[F1Contentious business agreementsN.I.
64.—(1) Subject to paragraph (2), a solicitor may make an agreement in, or evidenced by, writing with his client as to his remuneration in respect of any contentious business done, or to be done, by him providing that he shall be remunerated by a gross sum, or by a salary, or otherwise, and whether at a higher or lower rate than that at which he would otherwise have been entitled to be remunerated.
(2) Nothing in a contentious business agreement shall give validity to—
(a)any purchase by a solicitor of the interest, or any part of the interest, of his client in any action or other contentious proceeding; or
(b)any agreement by which a solicitor retained or employed to prosecute any action or other contentious proceeding, stipulates for payment only in the event of success in that action or proceeding; or
(c)any disposition, contract, settlement, conveyance, delivery, dealing or transfer which under the law relating to bankruptcy is invalid against a trustee or creditor in any bankruptcy or composition.]