Substitution of letter for summons

30. Substitution of letter for summons.— (1) The Court may, notwithstanding anything hereinbefore contained, substitute for a summons a letter signed by the Judge or such officer as he may appoint in this behalf, where the defendant is, in the opinion of the Court, of a rank entitling him to such mark of consideration.
(2) A letter substituted under sub-rule (1) shall contain all the particulars required to be stated in a summons, and, subject to the provisions of sub-rule (3), shall be treated in all respects as a summons.
(3) A letter so substituted may be sent to the defendant by post or by a special messenger selected by the Court, or in any other manner which the Court thinks fit; and, where the defendant has an agent empowered to accept service, the letter may be delivered or sent to such agent.