13. If the result of a test for the presence in any fish of a disease listed in Schedule 1 is positive, the Department may, by notice in writing served on the person appearing to have charge of those fish or any facilities or equipment which have or may have been in contact therewith—
(a)require the slaughter of all fish in farms where infected fish are present;
(b)require the destruction of all infected fish or contaminated fish; and
(c)require the disinfection of such of those facilities and equipment as may be specified in the notice.