We are trying to create a framework in statute that is flexible enough to cope with all sorts of agreements. The clause contains the word ''maximum''. When an agreement is approved, I would hope that the relevant Minister would consider carefully its term to ensure that it is appropriate and that we are not contracting for too long a time in the circumstances that the hon. Gentleman describes. However, a maximum of 20 years may be appropriate for the examples that I gave. I hope that, on that basis, he will withdraw the amendment.