SEC. 212.
[42 U.S.C. 412] (a)
For the purposes of determining average monthly
wage and quarters of coverage the amount of self-employment income
derived during any taxable year which begins before 1978 shall—
-
(1) in the case of a taxable year which is a calendar year,
be credited equally to each quarter of such calendar year; and
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(2) in the case of any other taxable year, be credited equally
to the calendar quarter in which such taxable year ends and to
each of the next three or fewer preceding quarters any part of
which is in such taxable year.
(b)
For the purposes of determining average indexed
monthly earnings, average monthly wage, and quarters of coverage
the amount of self-employment income derived during any taxable
year which begins after 1977 shall—
-
(1) in the case of a taxable year which is a calendar year or
which begins with or during a calendar year and ends with or during
such year, be credited to such calendar year; and
-
(2) in the case of any other taxable year, be allocated proportionately
to the two calendar years, portions of which are included within
such taxable year, on the basis of the number of months in each
such calendar year which are included completely within the taxable
year.
For purposes of clause (2), the calendar month in which a taxable
year ends shall be treated as included completely within that taxable
year.