Make only one Phone Type Value Mandatory under Employee Communication Area

Summary:

Hi

I have a requirement where I want to make the Phone Type Value 'Home Work Mobile' as Mandatory and others as optional when we Hire an Employee. I found the below note with a similar requirement but this did not work for me,

https://community.oracle.com/customerconnect/discussion/42411/how-make-filed-required-depending-on-drop-down-selection

Content (required):

How Make Filed Required depending on Drop down Selection

I saw a response was given to make the Phone Type list of values mandatory based on lookup value code.

I am using the below EL Expression as suggested in the note above

#{row.bindings.PhoneType.selectedValue.lookupCode=='HM'}