Calling UDT in autocomplete rule for Object Validation rule on Position Object

Summary:

Hi,

We are checking the possibility to use UDT for 100+ combination of Job & Department and call it in an autocomplete rule. 

We have received a requirement that whenever user will change the Job & Department on the Request Position screen and if it matches with the Job & Department combination of UDT then error should come. 

 To Implement this requirement, We have performed two steps which are mentioned below:

1) Create a UDT to store all the Department & Job combination. 

2) Call the UDT table in the autocomplete rule & if the Job & Department field value match with UDT combination which we created then display the error message that the "Job & Department value is not valid".