Saudi Arabia’s Crown Prince Mohammed Salman announced on Monday plans to approve a set of new draft laws designed to enhance the efficiency and integrity of the kingdom’s judicial system, a step that would eventually lead to an entirely codified law.

The prince (above), often referred to by his initials MBS, has launched a series of social and economic reforms aimed at modernising the conservative kingdom, which has no codified system of law to go with the texts making up syariah, or Islamic law...