Resources:
Useful Validation Rule Formulas for Account Addresses - https://help.salesforce.com/articleView?id=fields_useful_validation_formulas_account_address.htm&type=5
Common Regex Validation Knowledge Article #000213868 - https://help.salesforce.com/articleView?id=000334073&type=1&am...
Resource:
Common Regex Validation Knowledge Article #000213868 - https://help.salesforce.com/articleView?id=000334073&type=1&mode=1