I. DESCRIPTION OF SERVICES
Paragraph 4 is modified as follows:
4. Maximum budget
The maximum budget available for the services to be provided for the duration of the contract is 1,320,000.- Euros.
Note: CTA may use a negotiated procedure to extend services already underway, if CTA considers it necessary. There are two scenarios:
• Complementary services not included in the main contract but which, due to unforeseen circumstances, have become necessary to perform the contract, provided that the aggregate amount of additional services does not exceed 50% of the value of the principal contract;
• Additional services consisting of the repetition of similar services entrusted to the contractor, providing these services (i) are justified by special circumstances, and (ii) do not exceed the value and duration of the initial contract.