I searched xl2003's help for "number format codes" and found this statement:
Conditions To set number formats that will be applied only if a number meets
a condition you specify, enclose the condition in square brackets. The condition
consists of a comparison operator (comparison operator: A sign that is used in
comparison criteria to compare two values. Operators include: = Equal to, >
Greater than, < Less than, >= Greater than or equal to, <= Less than or equal
to, and <> Not equal to.) and a value.
====
I didn't see anything in help where the number of elements is specified.
> >Ma,
> >
[quoted text clipped - 8 lines]
> --
> Running Excel 2000 SP-3 on Windows 2000

Signature
Dave Peterson