UDF dependencies

Hi,

Is it possible to create a dependency between 2 UDFs i.e.

UDF1 would have the following values:

1. Full Credit

2. Partial Credit

3. Zero Impact Credit

UDF2 would be enabled if UDF1 = 3 and would contain the following:

3.1 Incorrect BP

3.2 Change in Start Date

3.3 etc...

Kind regards,

Jon