Duration of Admiralty writs in rem

4.  In Order 6, rule 8, for paragraph (1) there shall be substituted the following—

(1) For the purposes of service, a writ (other than a concurrent writ) is valid in the first instance—

(a)if an Admiralty writ in rem, for 12 months;

(b)where leave to serve the writ out of the jurisdiction is required under Order 11, for 6 months;

(c)in any other case, for 4 months

beginning with the date of its issue..