diff --git a/CHANGELOG.md b/CHANGELOG.md
index 646bed109..1ef70b785 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+45.0.0
+-----
+- Removed `use_cloud_org_for_api_access` setting.
+- Removed developer token validation checks.
+
 44.0.0
 -----
 - Compatibility with v25.1 of the API: https://developers.google.com/google-ads/api/docs/release-notes
diff --git a/google_ads_config.rb b/google_ads_config.rb
index 3a29b2c1d..ae9c6b09b 100644
--- a/google_ads_config.rb
+++ b/google_ads_config.rb
@@ -31,12 +31,6 @@
   # see: https://developers.google.com/identity/protocols/application-default-credentials.
   c.use_application_default_credentials = false
 
-  # Whether to use the Google Cloud Organization of your Google Cloud
-  # project instead of developer token to determine your Google Ads API access levels.
-  # Use this flag only if you are enrolled into a limited pilot that supports
-  # this configuration.
-  c.use_cloud_org_for_api_access = false
-
   # You can also authenticate using a service account. If "keyfile" is
   # specified below, then service account authentication will be assumed and
   # the above authentication fields ignored. Read more about service account
diff --git a/lib/google/ads/google_ads/config.rb b/lib/google/ads/google_ads/config.rb
index 47b8a1fb6..d5e8771f1 100644
--- a/lib/google/ads/google_ads/config.rb
+++ b/lib/google/ads/google_ads/config.rb
@@ -33,7 +33,6 @@ class Config
         attr_accessor :developer_token
         attr_accessor :login_customer_id
         attr_accessor :linked_customer_id
-        attr_accessor :use_cloud_org_for_api_access
         attr_accessor :ads_assistant
 
         attr_accessor :log_level
@@ -59,7 +58,6 @@ def initialize(&block)
           @developer_token = nil
           @login_customer_id = nil
           @linked_customer_id = nil
-          @use_cloud_org_for_api_access = false
           @ads_assistant = nil
 
           @log_level = nil
diff --git a/lib/google/ads/google_ads/google_ads_client.rb b/lib/google/ads/google_ads/google_ads_client.rb
index eef8b6813..8200dee26 100644
--- a/lib/google/ads/google_ads/google_ads_client.rb
+++ b/lib/google/ads/google_ads/google_ads_client.rb
@@ -110,10 +110,6 @@ def load_environment_config
           # Client library-specific variables
           @config.log_level = ENV.fetch("GOOGLE_ADS_RUBY_LOG_LEVEL", @config.log_level)
           @config.http_proxy = ENV.fetch("GOOGLE_ADS_RUBY_HTTP_PROXY", @config.http_proxy)
-          @config.use_cloud_org_for_api_access = ENV.fetch("GOOGLE_ADS_USE_CLOUD_ORG_FOR_API_ACCESS", @config.use_cloud_org_for_api_access)
-          if @config.use_cloud_org_for_api_access.is_a?(String)
-            @config.use_cloud_org_for_api_access = @config.use_cloud_org_for_api_access.downcase == "true"
-          end
           @config.ads_assistant = ENV.fetch("GOOGLE_ADS_ASSISTANT", @config.ads_assistant)
         end
 
diff --git a/lib/google/ads/google_ads/interceptors/metadata_interceptor.rb b/lib/google/ads/google_ads/interceptors/metadata_interceptor.rb
index 0c7fbe9cc..2bc4b6006 100644
--- a/lib/google/ads/google_ads/interceptors/metadata_interceptor.rb
+++ b/lib/google/ads/google_ads/interceptors/metadata_interceptor.rb
@@ -24,12 +24,11 @@ module Ads
     module GoogleAds
       module Interceptors
         class MetadataInterceptor < GRPC::ClientInterceptor
-          def initialize(developer_token, login_customer_id, linked_customer_id, use_cloud_org_for_api_access, ads_assistant)
+          def initialize(developer_token, login_customer_id, linked_customer_id, ads_assistant)
             super()
             @developer_token = developer_token
             @login_customer_id = login_customer_id
             @linked_customer_id = linked_customer_id
-            @use_cloud_org_for_api_access = use_cloud_org_for_api_access
             @ads_assistant = ads_assistant
           end
 
@@ -46,7 +45,8 @@ def server_streamer(request:, call:, method:, metadata: {})
           private
 
           def update_metadata(metadata)
-            if !@use_cloud_org_for_api_access
+            # Add the developer-token header if provided.
+            if @developer_token && !@developer_token.empty?
               metadata[:"developer-token"] = @developer_token
             end
 
diff --git a/lib/google/ads/google_ads/service_lookup.rb b/lib/google/ads/google_ads/service_lookup.rb
index 5c38d08e0..5abd9b5ce 100644
--- a/lib/google/ads/google_ads/service_lookup.rb
+++ b/lib/google/ads/google_ads/service_lookup.rb
@@ -31,7 +31,6 @@ def call
             config.developer_token,
             config.login_customer_id,
             config.linked_customer_id,
-            config.use_cloud_org_for_api_access,
             config.ads_assistant
           )
 
@@ -89,8 +88,9 @@ def headers
             headers[:"linked-customer-id"] = config.linked_customer_id.to_s
           end
 
-          unless config.use_cloud_org_for_api_access
-            headers[:"developer-token"] = config.developer_token if config.developer_token
+          # Add the developer-token header if provided.
+          if config.developer_token && !config.developer_token.empty?
+            headers[:"developer-token"] = config.developer_token
           end
 
           if config.ads_assistant
diff --git a/lib/google/ads/google_ads/version.rb b/lib/google/ads/google_ads/version.rb
index 7067ae243..97dec6059 100644
--- a/lib/google/ads/google_ads/version.rb
+++ b/lib/google/ads/google_ads/version.rb
@@ -20,7 +20,7 @@ module Google
   module Ads
     module GoogleAds
       CLIENT_LIB_NAME = 'gccl'.freeze
-      CLIENT_LIB_VERSION = '44.0.0'.freeze
+      CLIENT_LIB_VERSION = '45.0.0'.freeze
       VERSION = CLIENT_LIB_VERSION
     end
   end
diff --git a/test/test_config.rb b/test/test_config.rb
index aaf83262c..2e57f8987 100644
--- a/test/test_config.rb
+++ b/test/test_config.rb
@@ -67,26 +67,4 @@ def test_configure()
     assert_equal(developer_token_value, config.developer_token)
     assert_equal(ads_assistant_value, config.ads_assistant)
   end
-
-  def test_use_cloud_org_for_api_access()
-    config = Google::Ads::GoogleAds::Config.new
-
-    refresh_token_value = '1234'
-    client_id_value = 'abcd'
-    client_secret_value = '!@#$'
-    use_cloud_org_for_api_access = true
-
-    config.configure do |c|
-      c.refresh_token = refresh_token_value
-      c.client_id = client_id_value
-      c.client_secret = client_secret_value
-      c.use_cloud_org_for_api_access = use_cloud_org_for_api_access
-    end
-
-    assert_equal(refresh_token_value, config.refresh_token)
-    assert_equal(client_id_value, config.client_id)
-    assert_equal(client_secret_value, config.client_secret)
-    assert_nil(config.developer_token)
-    assert_equal(true, config.use_cloud_org_for_api_access)
-  end
 end
diff --git a/test/test_metadata_interceptor.rb b/test/test_metadata_interceptor.rb
index bc8ca3044..335c7eb75 100644
--- a/test/test_metadata_interceptor.rb
+++ b/test/test_metadata_interceptor.rb
@@ -13,12 +13,11 @@ def setup
       "dev_token",
       "login_id",
       "linked_id",
-      false,
       nil
     )
   end
 
-  def test_adds_developer_token_if_not_cloud_org
+  def test_adds_developer_token
     metadata = {}
     mi.request_response(
       request: nil,
@@ -67,16 +66,34 @@ def test_does_not_duplicate_pb_version
     assert_equal "gl-ruby/1.2.3 pb/1.2.3", metadata[:"x-goog-api-client"]
   end
 
-  def test_skips_developer_token_if_cloud_org
-    mi_cloud = Google::Ads::GoogleAds::Interceptors::MetadataInterceptor.new(
+  def test_appends_ads_assistant_to_x_goog_api_client
+    mi_ads_assistant = Google::Ads::GoogleAds::Interceptors::MetadataInterceptor.new(
       "dev_token",
       "login_id",
       "linked_id",
-      true,
+      "1.2.3"
+    )
+    metadata = { :"x-goog-api-client" => "gl-ruby/1.2.3" }
+    mi_ads_assistant.request_response(
+      request: nil,
+      call: nil,
+      method: nil,
+      metadata: metadata
+    ) do
+    end
+    assert_includes metadata[:"x-goog-api-client"], "gaada/1.2.3"
+    assert_includes metadata[:"x-goog-api-client"], "pb/#{Gem.loaded_specs["google-protobuf"].version}"
+  end
+
+  def test_skips_developer_token_if_nil
+    mi_nil = Google::Ads::GoogleAds::Interceptors::MetadataInterceptor.new(
+      nil,
+      "login_id",
+      "linked_id",
       nil
     )
     metadata = {}
-    mi_cloud.request_response(
+    mi_nil.request_response(
       request: nil,
       call: nil,
       method: nil,
@@ -86,23 +103,21 @@ def test_skips_developer_token_if_cloud_org
     assert_nil metadata[:"developer-token"]
   end
 
-  def test_appends_ads_assistant_to_x_goog_api_client
-    mi_ads_assistant = Google::Ads::GoogleAds::Interceptors::MetadataInterceptor.new(
-      "dev_token",
+  def test_skips_developer_token_if_empty
+    mi_empty = Google::Ads::GoogleAds::Interceptors::MetadataInterceptor.new(
+      "",
       "login_id",
       "linked_id",
-      false,
-      "1.2.3"
+      nil
     )
-    metadata = { :"x-goog-api-client" => "gl-ruby/1.2.3" }
-    mi_ads_assistant.request_response(
+    metadata = {}
+    mi_empty.request_response(
       request: nil,
       call: nil,
       method: nil,
       metadata: metadata
     ) do
     end
-    assert_includes metadata[:"x-goog-api-client"], "gaada/1.2.3"
-    assert_includes metadata[:"x-goog-api-client"], "pb/#{Gem.loaded_specs["google-protobuf"].version}"
+    assert_nil metadata[:"developer-token"]
   end
 end
diff --git a/test/test_service_lookup.rb b/test/test_service_lookup.rb
index 95683d5f3..c3d67f278 100644
--- a/test/test_service_lookup.rb
+++ b/test/test_service_lookup.rb
@@ -40,10 +40,19 @@ def test_headers_includes_all_when_fully_configured
     assert_equal "gaada/v0", headers[:"x-goog-api-client"]
   end
 
-  def test_headers_excludes_developer_token_when_cloud_org
+  def test_headers_excludes_developer_token_when_nil
     config = Google::Ads::GoogleAds::Config.new do |c|
-      c.developer_token = "test-dev-token"
-      c.use_cloud_org_for_api_access = true
+      c.developer_token = nil
+    end
+    lookup = create_lookup(config)
+
+    headers = lookup.send(:headers)
+    assert_nil headers[:"developer-token"]
+  end
+
+  def test_headers_excludes_developer_token_when_empty
+    config = Google::Ads::GoogleAds::Config.new do |c|
+      c.developer_token = ""
     end
     lookup = create_lookup(config)