143.113.  Deduction for health insurance costs of self-employed individuals, rules. — 1.  For all taxable years beginning on or after January 1, 2000, an individual taxpayer who is an employee within the meaning of Section 401(c)(1) of the Internal Revenue Code of 1986, as amended, shall be allowed to subtract from the taxpayer's Missouri adjusted gross income to determine Missouri taxable income an amount equal to the amount which the taxpayer has paid during the taxable year for insurance which constitutes medical care for the taxpayer, the taxpayer's spouse, and dependents to the extent that such amounts qualify as deductible pursuant to Section 162(l) of the Internal Revenue Code of 1986, as amended, for the same taxable year, and shall only be deductible to the extent that such amounts are not deducted on the taxpayer's federal income tax return for that taxable year.

  2.  The director of the department of revenue shall promulgate rules and regulations to administer the provisions of this section.  No rule or portion of a rule promulgated pursuant to the authority of this section shall become effective unless it has been promulgated pursuant to the provisions of chapter 536.