(A) Household income for those households that, by contract for other than an hourly or piecework basis or by self-employment, derive their annual income in a period of time shorter than one year shall be calculated by averaging such income over a twelve-month period. Notwithstanding the preceding sentence, household income resulting from the self-employment of a member in a farming operation, who derives income from such farming operation and who has irregular expenses to produce such income, may, at the option of the household, be calculated by averaging such income and expenses over a 12-month period. Notwithstanding the first sentence, if the averaged amount does not accurately reflect the household’s actual monthly circumstances because the household has experienced a substantial increase or decrease in business earnings, the State agency shall calculate the self-employment income based on anticipated earnings.

(B) Household income for those households that receive nonexcluded income of the type described in subsection (d)(3) of this section shall be calculated by averaging such income over the period for which it is received.

(C) Simplified determination of deductions.— (i) In general .— Except as provided in clause (ii), for the purposes of subsection (e), a State agency may elect to disregard until the next recertification of eligibility under section 2020(e)(4) of this title 1 or more types of changes in the circumstances of a household that affect the amount of deductions the household may claim under subsection (e). (ii) Changes that may not be disregarded .— Under clause (i), a State agency may not disregard— (I) any reported change of residence; or (II) under standards prescribed by the Secretary, any change in earned income.