23.—(1) Article 58 (amendment of contracts and general terms and conditions) is amended as follows.
(2) In paragraph 1, for “Regulatory authorities” substitute “The regulatory authority”.
(3) In paragraph 2, omit “or Member State”.
(4) In paragraph 3—
(a)for “Regulatory authorities” substitute “The regulatory authority”;
(b)for “national network codes” substitute “industry codes”.