It would also be unconstitutional, as one parliament would be effectively determining the affairs of a future one. However, they consisted of the Special Powers Bill, which allowed the police extra powers to stop, search and arrest people, restrictions on ships and aircrew, along with compensation.
The act in question is unconstitutional because it would give one parliament control over the affairs of a future one. The Special Powers Bill was part of this act, which gave police more authority to stop, search, and arrest individuals, restricted ships and air crews, and provided compensation.