contracts are usually frm the date of ur training (march, april, may or june) until 31st october.
i'm pretty sure in MAN u are trained on all four aircraft. A320, A321, B757 and B767, even if u dont operate on them all. in your first year u may not get trained on 767 because u dont normally do any long haul in your first season. however, this year at gatwick some new starters did!!