I believe TCAS Traffic advisory manoeuvers have a 5 second and 1/4g compliance requirment, strengthened or reversal Resolution advisory manoeuvers have a 3second and 1/2g compliance requirment. Either way have flown much in that part of the world, very common to hear Brazilian pilots talk in portugese to ATC, and talking to English to non domestic Aircraft, which doesn't contribute much to the situational awareness of crews who are operating in the same airspace. Maybe a contributing cause if it was in fact a collision. Sad news.
