A more thorough explanation:

Definition: Perficere susceptum munus is a Latin term used in Scots law, which means to perform the duties of an office undertaken. It refers to the obligation of a person who has assumed an office to fulfill the responsibilities of that office.

Example: If a person is appointed as a judge, they have a duty to hear cases and make judgments. They cannot resign from the office capriciously or without a valid reason. They must perform the duties of the office they have undertaken.

Rebus Integris: Rebus integris is another Latin term used in Scots law, which means matters being complete, and no performance having taken place. It refers to a situation where nothing has been done towards the performance of a contract or agreement.

Example: If two parties enter into a contract, but no performance has taken place, the contract can be rescinded. For instance, if a person agrees to sell their car to another person, but the buyer has not paid the agreed amount, and the seller has not handed over the car, the contract can be rescinded because rebus integris applies.

The examples illustrate that perficere susceptum munus and rebus integris are legal concepts that deal with the performance of duties and obligations. They emphasize the importance of fulfilling responsibilities and completing agreements in Scots law.