The rules state the following:
"Tanks can move any spaces vertically, horizontally or diagonally with these restrictions:

A tank cannot move to black squares (mines).
A tank cannot jump over the player's or opponent's tanks..."

This seems to imply that the following must also be true:
A tank can jump over black squares (mines).
A tank can move to squares occupied by the player's or opponent's tanks.

Later the rules specify that a tank is destroyed if an opposing tank enters its square. However, the movement diagram suggests that tanks cannot jump over mines or move to squares occupied by friendly tanks.

So what is it? Can this be clarified?