Coding Instructions

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Fill in the boxes with the appropriate birth date. If the complete birth date is known, do
not leave any boxes blank. If the month or day contains only a single digit, fill the first
box in with a “0.” For example: January 2, 1918, should be entered as 01-02-1918.
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Sometimes, only the birth year or the birth year and birth month will be known. These
situations are handled as follows:
— If only the birth year is known (e.g., 1918), then enter the year in the “year” portion
of A0900, and leave the “month” and “day” portions blank. If the birth year and birth
month are known, but the day of the month is not known, then enter the year in the
“year” portion of A0900, enter the month in the “month” portion of A0900, and leave
the “day” portion blank.