Please explain this Validation Rule

Question

Can anybody explain me what does this validation rule does. This is on standard object Account.

AND(
OR(
RecordType.Name=="Subcontractor"
),
OR(
ISNEW(), 
ISCHANGED(RecordTypeId)
),
NOT($Setup.VRuleSettings__c.HasSubsRTAccess__c )
)

Answer 1

The following points all have to resolve to true for the validation rule to trigger an error:

• Record Type name must be Subcontractor
• Record must be newly created or the Record Type must have been changed
• The Custom Setting HasSubsRTAccess__c in VRuleSettings__c must be false for this User (this can be User, Profile or Organization specific)

Answer 2

I'd format it like this. It makes what it does clearer.

AND( OR(RecordType.Name=="Subcontractor"),
OR(ISNEW(), ISCHANGED(RecordTypeId)),
NOT($Setup.VRuleSettings__c.HasSubsRTAccess__c )
)

This is True if the

((record type is subcontractor) AND
(the record is a new one OR the record type ID has changed)) AND
( Not ...HasSubsRtAccess__c is True)

I'm not sure what that last condition means, but if it isn't true, the whole expression will be false. So, ...HasSubsRtAccess__c must be false (because of the NOT) for the whole condition to be True.