How to make ready only "Name & Number" attributes on Part Edit Common Attribute Page

Version: Windchill 12.1

Use Case: I want make ready only "Name & Number" attributes on Part Edit Common Attribute Page :

Description:

I am unable to figure if I should use data utility or Validator for this.

1. I tried data utility but I didn't triggered as I am able to registered data utility ID since there is no such Edit Common Attribute layout.

public class DisableName extends DefaultDataUtility {
	protected static final Logger logger = LogR.getLogger(DisableName.class.getName());
	@Override
	public UIValidationStatus getDataValue(String filedName, Object object, ModelContext modelContext)
			throws WTException {
		System.out.println("---- DisableName on Part CommonAttribute Started-------------");
		UIValidationStatus status = UIValidationStatus.ENABLED;
		System.out.println("---- filedName :" + filedName);
		
		if (modelContext.getDescriptorMode().equals(ComponentMode.EDIT)) {
			if (filedName.equalsIgnoreCase("name")|| filedName.equalsIgnoreCase("number") ) {
				System.out.println("---- filedName available ");
				status = UIValidationStatus.ATTR_HIDDEN_VALUE;
			}
		}
		System.out.println("---- returning status : " + status);
		return status;
	}
}

2. I tried extending EditPartCommonAttrsActionValidator and used preValidateAttribute, but It also didn't got triggered..

public class PartEditCommonAttributeValidator extends EditPartCommonAttrsActionValidator {
	@Override
	public UIValidationStatus preValidateAttribute(UIValidationKey var1, UIValidationCriteria var2) {
		UIValidationStatus status = super.preValidateAttribute(var1, var2);
		System.out.println("---- PartEditCommonAttributeValidator Validator Started-------------");
		Persistable launchedFrom = var2.getContextObject().getObject();
		System.out.println("launchedFrom" + launchedFrom);
		System.out.println("validationKey : " + var1);
		status = UIValidationStatus.ATTR_HIDDEN_VALUE;
		System.out.println("---- Validator Status : " + status);
		return status;
	}
}

Can you please help to get correct methodology to implement my requirement. 

Thank you in advance.