In the TCG we have a Konami e-mail that states that the Union monster will not protect the monster it is equipped on, in the case of a mass destruction effect.
In the OCG, the Union monster can protect the monster it is equipped on, and destroy itself only, in the case of a mass destruction effect.
In the OCG, the Union monster can protect the monster it is equipped on, and destroy itself only, in the case of a mass destruction effect.