Done to death, rg, on previous threads. Me no, not with the expected 'thickness' of the zone. A few years back I asked some of the 'crusty' senior BA 'chaps' and they said rest was rostered on a flight at a specific time and these follk would normally take it at the assigned time. Many others have said not. You need to see AF flight crew orders to answer the question there.
NB The ITCZ is NOT an emergency; it is not an ABNORMAL occurrence; it is crossed many times by many aircraft all over the world every day. 2 COMPETENT F/Os are more than capable of traversing it. In essence it is just a large weather front, but it appears to have gathered some special 'mystique' for some here.