A more thorough explanation:

SERVITIA SOLITA ET CONSUETA

SERVITIA SOLITA ET CONSUETA is a Latin term used in Scots law which means "services used and wont". It refers to a common return required by certain charters, usually implying military service, from a vassal to a lord.

An example of SERVITIA SOLITA ET CONSUETA would be a vassal who is required to provide military service to their lord in exchange for land or other benefits. Another example would be a vassal who is required to provide a certain amount of crops or livestock to their lord each year.

These examples illustrate how the term SERVITIA SOLITA ET CONSUETA is used in Scots law to describe the obligations of a vassal to their lord. It shows that these obligations are often related to military service or the provision of goods, and that they are considered to be customary and expected.