Power to summon witnesses

11.39Each House may summon witnesses to appear before it and answer questions. For details of the procedure, see paras 38.31–38.39 and 40.17. Each House is also invested with the power of ordering all documents to be laid before it which are necessary for its information. For the use of this power by the House of Lords, see para 7.33; for the House of Commons, see paras 7.317.32 and 11.40; for its use when delegated to committees, see para 38.31.