How long does a person have to resign from all but one of the State Legislatures when they are a member of two or more?
The context provided does not specify how long a person has to resign from all but one of the State Legislatures when they are a member of two or more. Instead, it states that after being chosen a member of multiple State Legislatures, a person's seat in the Legislatures of all such States will become vacant if they do not resign within the period specified in rules made by the President. However, the exact duration is not given within the provided text.