(1) Where one of a couple is entitled to illness benefit, jobseeker’s benefit, jobseeker’s benefit (self-employed), injury benefit, disablement pension, State pension (contributory), State pension (non-contributory), State pension (transition) or invalidity pension and the other is entitled to farm assist, the total of the amount payable to them by way of that benefit or pension and farm assist (in this subsection referred to as "the relevant amount") shall not exceed the total amount of benefit or pension, as the case may be, (including any increases thereof, where appropriate), or the total amount of farm assist (including any increases thereof, where appropriate), whichever is the greater (in this subsection referred to as "the greater amount") that would be payable if only one of the couple were in receipt of benefit, pension or farm assist, as the case may be, and, if the relevant amount would but for this subsection exceed the greater amount, the amount of farm assist payable to the spouse, civil partner or cohabitant who is entitled to such farm assist shall be reduced by the amount of the excess.