The Clerk of the Parliaments is the chief clerk of the House of Lords in the Parliament of the United Kingdom. The position has existed since at least 1315, and duties include preparing the minutes of Lords proceedings, advising on proper parliamentary procedure and pronouncing royal assent. Many of the Clerk's duties are now fulfilled by his deputies and the Clerk of the Parliaments' Office.

Royal assent is the method by which a monarch formally approves an act of the legislature, either directly or through an official acting on the monarch's behalf. In some jurisdictions, royal assent is equivalent to promulgation, while in others that is a separate step. Under a modern constitutional monarchy, royal assent is considered little more than a formality. Even in nations such as the United Kingdom, Norway, the Netherlands, Liechtenstein and Monaco which still, in theory, permit their monarch to withhold assent to laws, the monarch almost never does so, except in a dire political emergency or on advice of government. While the power to veto by withholding royal assent was once exercised often by European monarchs, such an occurrence has been very rare since the eighteenth century.