Tom C. Clark,
Tank Truck Rentals v. Commissioner of Internal Revenue…
“ Commissioner, 2 Cir., 175 F.2d 711, 713, the test of nondeductibility always is the severity and immediacy of the frustration resulting from allowance of the deduction. The flexibility of such a standard is necessary if we are to accommodate both the congressional intent to tax only net income, and the presumption against congressional intent to encourage violation of declared public policy.Certainly the frustration of state policy is most complete and direct when the expenditure for which deduction is sought is itself prohibited by statute. ”
