(3) If the summons is posted by registered letter it shall be deemed for the purposes of subsection (2)(b) of this section to have been served at the time when the letter would be delivered in the ordinary course of post.
Sections 5 to 9 were substituted, as from 4 July 1980, by section 4 Commissions of Inquiry Amendment Act 1980 (1980 No 2).