(1)This Part does not apply to a term of a contract, or to a notice, to the extent that it reflects—
(a)mandatory statutory or regulatory provisions, or
(b)the provisions or principles of an international convention to which the United Kingdom or the EU is a party.
(2)In subsection (1) “mandatory statutory or regulatory provisions” includes rules which, according to law, apply between the parties on the basis that no other arrangements have been established.