5. Time, place and purpose of attendance to be specified in summons.

Every summons for the attendance of a person to give evidence or to produce a document shall specify the time and place at which he is required to attend, and also whether his attendance is required for the purpose of giving evidence or to produce a document, or for both purposes; and any particular document, which the person summoned is called on to produce, shall be described in the summons with reasonable accuracy.

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