2.1.1052 Part 4 Section, PV

a.   The standard does not specify a default for the optional argument type.

In Office, if the value for type is omitted it defaults to value of 0.

b.   The standard states that the argument type is truncated to an integer.

Office does not truncate the argument type to an integer.

c.   The standard states that if the argument type is any number other than 0 or 1, #NUM! is returned.

Office allows the value for argument type to be omitted or nonzero.