Losses from owning and maintaining race horses may not be set off against other sources of income as amended. The amendment omits sub-sections (1) and (2) and rewords sub-section (3) so that the amount of loss incurred by the assessee in the activity of owning and maintaining race horses in any assessment year shall not be set off against income from any source other than that activity in that year, and replaces a prior cross-reference with an explicit reference to the activity of owning and maintaining race horses.