After the passage of the amendment (1868), the rights afforded under the bill of rights were gradually interpreted by the courts to apply to the state governments as well.

The answer to this question is "4th amendment" as per the initiation of the Bill of Rights in the United States. After the passage of the 4th amendment (1868), the rights afforded under the bill of rights were gradually interpreted by the courts to apply to the state governments as well.

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