1 Within the contracts, LUL has rights to request that an Infraco undertake:
■ Minor works (mandatory) - works below £20,000, to a maximum aggregate of £4 million per contract in any one year, e.g. refitting part of a ticket office. LUL keeps a running total of money spent on minor works, and claws back any money unspent in the next financial year. Minor works must take place to an agreed timetable, otherwise the Infraco faces a payment abatement;
■ Intermediate works (mandatory) - between £20,000 and £5 million, up to a maximum aggregate value of £5 million per year. Intermediate works are executed via LUL's specified rights (see below), but are separate from ordinary specified rights as i) the Infraco must undertake the work, and ii) there is no pre-determined subject matter;
■ LUL specified rights - of varying value, with subject matter generally agreed at contract signature, e.g. air-conditioning; actions relating to Heathrow Terminal 5; seventh car on Jubilee Line trains, but for which compensation must be generally agreed before the Specified Right is exercised; and
■ Major enhancements - of negotiatiable value, where design and feasibility work are required and which the Infraco is not mandated to deliver. Examples include station congestion relief projects and line extension programmes. For these works, LUL has a procurement process which includes: consultation of the LUL Service Plan, a check that the requirement is not already part of the contract, preparation of a "Requirement Statement", a business case, and financial approval. LUL may use an alternative provider for such works (and - with Infraco agreement - for intermediate works).