SMOC is corect and for those a little confused by the term instructor, a small deal was done some time back because CX were taking FTA instructors. Therefore, a "Short" and "Long" course was developed.
The Short course are for those with a fATPL. CX paid for the FI rating and those cadets must remain at FTA for 3 years Fight Instructing. Once again however, their conract does not specify a definate job with CX and there is nothing in writtting confirming that upon joining CX, they will get the ex-pat allowance. The same goes for the long course which is a 4 year course. CX pays for the fATPL (just like the normal CPP) and then they pay for the FI and stay at FTA for 3 years flight instructing.
The "extra 3 years seniority" again means nothing.