18.—(1) Where the Scottish Ministers cause a bovine animal or steer to be slaughtered under section 32 of the Act in its application to brucellosis, they must pay compensation in accordance with this article, together with articles 19 and 20.
(2) The compensation must be–
(a)where the slaughtered animal is an infected animal or a reactor, the lesser of–
(i)75% of its market value, or
(ii)93.75% of the average price in respect of the month which occurred 2 months prior to the month in which the market value of the animal was determined in accordance with article 19, rounded down to the nearest multiple of £4;
(b)where the slaughtered animal has been exposed to the infection of brucellosis but is not an infected animal or a reactor, an amount equal to its market value.