Notwithstanding this Chapter -

(a) only one carer's benefit shall be payable to a carer, and only one carer's benefit shall be payable in any week in respect of the full-time care and attention being provided to a relevant person,

(b) carer's benefit shall not be payable in respect of the full-time care and attention being provided to a relevant person in any case where the relevant person is in receipt of an increase of disablement pension under section 78 in respect of constant attendance, and

(c) carer's benefit shall not be payable in respect of the full-time care and attention being provided to a relevant person in any case where a carer's allowance under Part 3 is being paid to any person in respect of the full-time care and attention being provided to the same relevant person

(d) [deleted]