Bearli,
It will depend upon a couple things,
A) are you current on type (Y or N)
B) is DHC6 on a JAA licence (Y or N)
an N to either will probably mean a trip to Toronto and a bond. One year is the normal and hard to enforce if longer, if they are putting up big $ to make you employable they dont need you zipping off (hard in an otter i know) elsewhere
Having done time with Zimex before, when I went back the second time I was Y to both and no bond
Having said that the last ZIM contract i signed was 7 years ago so dont ask me for any details