| 2.5. | Intangible assets other than goodwill |
| (a) | Airport slots and Loyalty program |
Airport slots and the Coalition and Loyalty program are intangible assets of indefinite useful life and are subject to impairment tests annually as an integral part of each CGU, in accordance with the premises that are applicable, included as follows:
Airport slots – Air transport CGU
Loyalty program – Coalition and loyalty program Multiplus CGU
(See Note 16)
The airport slots correspond to an administrative authorization to carry out operations of arrival and departure of aircraft at a specific airport, within a specified period.
The Loyalty program corresponds to the system of accumulation and redemption of points that has developed Multiplus S.A., subsidiary of TAM S.A.
The Brands, airport Slots and Loyalty program were recognized in fair values determined in accordance with IFRS 3, as a consequence of the business combination with TAM and Subsidiaries.
| (b) | Computer software |
Licenses for computer software acquired are capitalized on the basis of the costs incurred in acquiring them and preparing them for using the specific software. These costs are amortized over their estimated useful lives, for which the Company has been defined useful lives between 3 and 10 years.
Expenses related to the development or maintenance of computer software which do not qualify for capitalization, are shown as an expense when incurred. The personnel costs and others costs directly related to the production of unique and identifiable computer software controlled by the Company, are shown as intangible Assets others than Goodwill when they have met all the criteria for capitalization.
| (c) | Brands |
The Brands were acquired in the business combination with TAM S.A. and Subsidiaries and recognized at fair value under IFRS. During the year 2016, the estimated useful life of the brands change from an indefinite useful life to a five-year period, the period in which the value of the brands will be amortized (See Note 15).