In section 82 (variation of agreements), after subsection (1) insert -
"(1A) Subsection (1) does not apply to a variation in the rate of interest charged under an agreement not secured on land (see section 78A).
(1B) Subsection (1) does not apply to a variation in the rate of interest charged under an agreement secured on land if -
(a) the agreement falls within subsection (1D), and
(b) the variation is a reduction in the rate.
(1C) Subsection (1) does not apply to a variation in any other charge under an agreement if -
(a) the agreement falls within subsection (1D), and
(b) the variation is a reduction in the charge.
(1D) The agreements referred to in subsections (1B) and (1C) are -
(a) an authorised business overdraft agreement,
(b) an authorised non-business overdraft agreement, or
(c) an agreement which would be an authorised non-business overdraft agreement but for the fact that the credit is not repayable on demand or within three months.
(1E) Subsection (1) does not apply t