(1) The chief executive may, by written notice, require the licence holder to modify or replace the VMS equipment installed on the relevant boat.
(2) The notice must--
(a) identify the licence holder, the licence and the boat; and
(b) state the required modification or replacement; and
(c) state a reasonable period of at least 3 months for the licence holder to comply with the notice; and
(d) be accompanied by, or include, an information notice about the decision to make the requirement.
(3) The licence holder must, within the stated period, make the required modification or replacement.