1. Article 23FA(1) and (2) do not apply to the extent that the contract or arrangement provides expressly that those paragraphs do not apply.
2. Article 23FA(1) does not apply to a reference to a benchmark to which it would otherwise apply (taking account of Article 23FA(2), where relevant) to the extent that the contract or arrangement provides expressly that the reference does not include the benchmark as it exists at the times described in Article 23FA(1).
3. Article 23FA(1) to (5) do not prevent or otherwise affect the operation of fallback provision, either before or after the benchmark in question became an Article 23A benchmark, subject to paragraph 5 and any regulations made under paragraph 6.
4. "Fallback provision" means express provision for the contract or arrangement -
(a) to operate, or to be varied so as to operate, by reference to something other than the benchmark in question (temporarily or permanently), or
(b) to terminate,
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