“Section 8(1) of the Contracts (Rights of Third Parties) Act 1999 allowed for a promisor to give a third party an enforceable substantive right subject to a procedural condition on which the promisor might but need not insist. Section 8(2) of the Act allowed for a promisor to give a third party an enforceable procedural right which the third party might but need not exercise, since the right was unilateral.”
WLR Daily, 17th April 2013
Source: www.iclr.co.uk