The rules in section 35 - 10 do not apply to a * business activity for an income year if:
(a) the amount of assessable income from the business activity for the year; or
(b) you started to carry on the business activity, or stopped carrying it on, during the year--a reasonable estimate of what would have been the amount of that assessable income if you had carried on that activity throughout the year;
is at least $20,000.