Clause 3 of Article I, Section 9 of the Constitution forbids the federal government from passing EX POST FACTO laws, and Clause 1 of Article I, Section 10, forbids state governments from doing the same.
Unless a constitution forbids it, as many as you wish
No. The Constitution forbids Bills of Attainder, where the Congress declares a person to be guilty of a crime by passing legislation to that effect. The Constitution preserves the Writ of Habeas Corpus except under very limited and specific circumstances.
Keep Militia
The Eighth Amendment to the Constitution forbids excessive bails/fines and cruel and unusual punishment.
The practice of untouchability.
no. never. the queen forbids it. if it is found that you have been singing, you could face prosecution and may have your genitals removed.
The U.S. Constitution forbids any law that conflicts with existing Federal laws. It also forbids any law that violates the Constitution itself.
Their new constitution forbids war.
Unless a constitution forbids it, as many as you wish
The Constitution forbids the president to spend money unless the spending is authorized by congress.
Products sent from one state to another
yes, a state can not make their own money