Address validation

Hi,

I’m trying to set up an address validation field on accounts. I’ve created a custom field called Address Validation that gets updated with a timestamp when the record is created and modified and have added the validation to that field. What I’m trying to accomplish with the validation is that the Primary Bill To Country, Primary Bill To Street Address and Primary Bill to City cannot be null and in the case of US addresses the zip code and state cannot be null. I’ve been able to get the first part but I am finding it a challenge adding the