Add custom errors for authorizing official

src/registrar/forms/__init__.py

@@ -5,6 +5,7 @@ from .domain import (
     DomainSecurityEmailForm,
     DomainOrgNameAddressForm,
     ContactForm,
+    AuthorizingOfficialContactForm,
     DomainDnssecForm,
     DomainDsdataFormset,
     DomainDsdataForm,

src/registrar/forms/domain.py

@@ -148,6 +148,9 @@ class ContactForm(forms.ModelForm):
         for field_name in self.required:
             self.fields[field_name].required = True
 
+        # Set custom form label
+        self.fields["middle_name"].label = "Middle name (optional)"
+        
         # Set custom error messages
         self.fields["first_name"].error_messages = {'required': 'Enter your first name / given name.'}
         self.fields["last_name"].error_messages = {'required': 'Enter your last name / family name.'}
@@ -159,6 +162,23 @@ class ContactForm(forms.ModelForm):
         }
         self.fields["phone"].error_messages = {'required': 'Enter your phone number.'}
 
+class AuthorizingOfficialContactForm(ContactForm):
+    """Form for updating authorizing official contacts."""
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        # Set custom error messages
+        self.fields["first_name"].error_messages = {'required': 'Enter the first name / given name of this contact.'}
+        self.fields["last_name"].error_messages = {'required': 'Enter the last name / family name of this contact.'}
+        self.fields["title"].error_messages = {
+            'required': 'Enter the title or role in your organization of this contact \
+            (e.g., Chief Information Officer).'
+        }
+        self.fields["email"].error_messages = {
+            'required': 'Enter an email address in the required format, like name@example.com.'
+        }
+        self.fields["phone"].error_messages = {'required': 'Enter a phone number for this contact.'}
+
 
 class DomainSecurityEmailForm(forms.Form):
     """Form for adding or editing a security email to a domain."""

src/registrar/views/domain.py

@@ -33,6 +33,7 @@ from registrar.models.utility.contact_error import ContactError
 
 from ..forms import (
     ContactForm,
+    AuthorizingOfficialContactForm,
     DomainOrgNameAddressForm,
     DomainAddUserForm,
     DomainSecurityEmailForm,
@@ -182,7 +183,7 @@ class DomainAuthorizingOfficialView(DomainFormBaseView):
     model = Domain
     template_name = "domain_authorizing_official.html"
     context_object_name = "domain"
-    form_class = ContactForm
+    form_class = AuthorizingOfficialContactForm
 
     def get_form_kwargs(self, *args, **kwargs):
         """Add domain_info.authorizing_official instance to make a bound form."""