Notwithstanding the preceding sentences, such term also includes any amount, not otherwise allowable as a deduction, paid or incurred to satisfy any part of an assessment levied by a soil or water conservation or drainage district to defray expenditures made by such district (i) which, if paid or incurred by the taxpayer, would without regard to this sentence constitute expenditures deductible under this section, or (ii) for property of a character subject to the allowance for depreciation provided in section
167 and used in the soil or water conservation or drainage district’s business as such (to the extent that the taxpayer’s share of the assessment levied on the members of the district for such property does not exceed 10 percent of such assessment).