is indivisible: when the previous holder ceases to hold the title, it is inherited by a single individual. Many titles and offices are not hereditary (such as democratic state offices) and they are subject to different rules of succession.

A hereditary line of succession may be limited to heirs of the body, or may also pass to collateral lines, if there are no heirs of the body, depending on the succession rules. These concepts are in use in English inheritance law.

The rules may stipulate

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