Contents of summons

Every summons issued under section 5 shall— (a) be issued in duplicate; (b) be signed by the inquiring authority; (c) be sealed with the official seal of the inquiring authority; (d) specify the date, time, and place at which the person summoned is required to attend, and also whether his attendance is required for the purpose of giving evidence, or to discover and produce a document or other material, or for both the purposes.