From the 744 DDG:
TCAS must be operative in Afghanistan for all flights operating at or above FL 240. In the event of a TCAS CAT "B" extension; the extension can not be greater than seven (7) days from the original DDG due date, for a total of ten (10) days to comply with the United Arab Emirates, India, and European Union maximum deferral requirement. The United Arab Emirates, India, and the European Union allow the TCAS (ACAS) to be deferred for a maximum of 10 days; however, a deferral is valid only until the aircraft transits a maintenance base. Annotate the deferral on the ATC Flight Plan in the Remarks section as "TCAS INOP". The location of the repair station must be designated at the time the item is deferred. This location may change on analysis of the fault and repair capabilities of the designated location.