(a)

Old-age, survivors, and disability insurance

In addition to other taxes, there shall be imposed for each taxable year, on the self-employment income of every individual, a tax equal to the following percent of the amount of the self-employment income for such taxable year:       In the case of a taxable year Beginning after: xlAnd before: Percent: December 31, 1983 January 1, 1988 11.40 December 31, 1987 January 1, 1990 12.12 December 31, 1989 12.40

(b)

Hospital insurance

In addition to the tax imposed by the preceding subsection, there shall be imposed for each taxable year, on the self-employment income of every individual, a tax equal to the following percent of the amount of the self-employment income for such taxable year:       In the case of a taxable year Beginning after: xlAnd before: Percent: December 31, 1983 January 1, 1985 2.60 December 31, 1984 January 1, 1986 2.70 December 31, 1985 2.90.

(c)

Relief from taxes in cases covered by certain international agreements

During any period in which there is in effect an agreement entered into pursuant to section 233 of the Social Security Act with any foreign country, the self-employment income of an individual shall be exempt from the taxes imposed by this section to the extent that such self-employment income is subject under such agreement exclusively to the laws applicable to the social security system of such foreign country.