Translation of "invalidation" into Chinese

Should any invalidity be found because of native title, the lease will be validated.

如因土著产权而失效,租约将被确认有效。

An error on a question of law invalidating the decision; or

使判决无效的法律问题上的错误;或

A ballot paper containing more than one name from the region will be declared invalid.

选票上写有该地区一个以上国家的名称将宣布无效。