Fourteen sections deciding which losses may be set off, against what, and for how long they survive.
Sections 108 to 121 separate set-off within a head, set-off across heads, and carry-forward. House property, capital gains, ordinary business, speculation business, specified business and specified activity each get their own carry-forward rule, and sections 116 to 118 deal with what happens to accumulated losses and unabsorbed depreciation in an amalgamation, a demerger or a co-operative bank reorganisation. Section 120 blocks set-off against undisclosed income found in a search, requisition or survey.