With reference to the (a) O R Tambo International Airport, (b) Cape Town International Airport and (c) King Shaka International Airport, (i) by what date will the signage be updated and/or upgraded to clearly indicate which are the (aa) international and (bb) domestic terminals, (ii) what are the time frames, timelines, deadlines and milestones in this regard, (iii) what are the reasons that the signage has not been updated and upgraded to date and (iv) what are the interim arrangements that inform passengers of the specified information?