Rule 23 regulates depositions taken for pending legal actions, while Rule 24 regulates depositions taken to preserve evidence for future legal actions. The document then discusses the various methods of discovery laid out in the rules, including depositions, interrogatories, requests for admission, and medical examinations. It provides guidance on when depositions can be taken, how they are conducted, and how they can be used in court proceedings, noting that depositions are generally inadmissible as evidence but have some exceptions. The document also discusses taking depositions in foreign countries and the differences between commissions and letters rogatory for obtaining these types of depositions internationally.