http://www.w3.org/ns/prov#value | - No deduction shall be allowed for any taxable year for any contribution to a multiemployer pension plan with respect to which a deduction was previously allowed.(b) REGULATIONS- The Secretary of the Treasury shall promulgate such regulations as necessary to clarify that a taxpayer shall not be allowed, with respect to any taxable year, an aggregate amount of deductions for contributions to a multi
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