7. In section 135(6) (equality of terms: determination of length of arrears period in Scottish cases involving fraud, error or incapacity)—
(a)after “section 132(5)(a)” insert “or 134(6)(a)”, and
(b)for “20 years” substitute—
“5 years; and—
(a)if, as a result of subsection (7), that period is reckoned as a period of more than 5 years but no more than 20 years, the period for the purposes of section 132(5)(b) or (as the case may be) section 134(6)(b) is that extended period;
(b)if, as a result of subsection (7), that period is reckoned as a period of more than 20 years, the period for the purposes of section 132(5)(b) or (as the case may be) section 134(6)(b) is a period of 20 years.”.