diff --git a/app/controllers/v1/resources_controller.rb b/app/controllers/v1/resources_controller.rb
index 23842f6c..edb392ec 100644
--- a/app/controllers/v1/resources_controller.rb
+++ b/app/controllers/v1/resources_controller.rb
@@ -16,7 +16,7 @@ class ResourcesController < ApplicationController
     def create
       PurlCocinaUpdater.new(@purl, @cocina_object).update
 
-      PurlAndStacksService.update(purl: @purl, cocina_object: @cocina_object, file_uploads:, version:, version_date:, must_version:)
+      PurlAndStacksService.update(purl: @purl, cocina_object: @cocina_object, file_uploads:, version:, version_date:)
 
       render json: true, location: @purl, status: :created
     end
@@ -68,12 +68,5 @@ def version
       # TODO: Once DSA is providing the version, || '1' can be removed.
       version || '1'
     end
-
-    def must_version
-      # This allows DSA to indicate that the object must be in the versioned layout.
-      # TODO: This is a temporary parameter until migration is complete.
-      # It is necessary so that DSA that a previously unversioned object now has versions.
-      params.require(:resource)[:must_version] || false
-    end
   end
 end
diff --git a/app/services/purl_and_stacks_service.rb b/app/services/purl_and_stacks_service.rb
index 93bd19da..751a6302 100644
--- a/app/services/purl_and_stacks_service.rb
+++ b/app/services/purl_and_stacks_service.rb
@@ -4,8 +4,8 @@ def self.delete(purl:, version:)
     new(purl:).delete(version:)
   end
 
-  def self.update(purl:, cocina_object:, file_uploads:, version:, version_date:, must_version:) # rubocop:disable Metrics/ParameterLists
-    new(purl:).update(cocina_object:, file_uploads:, version:, version_date:, must_version:)
+  def self.update(purl:, cocina_object:, file_uploads:, version:, version_date:)
+    new(purl:).update(cocina_object:, file_uploads:, version:, version_date:)
   end
 
   # @param purl [Purl] the PURL model object.
@@ -18,12 +18,11 @@ def initialize(purl:)
   # @param file_uploads [Hash<String,String>] map of cocina filenames to staging filenames (UUIDs)
   # @param version [String] the version number
   # @param version_date [DateTime] the version date
-  # @param must_version [Boolean] true if the versioned layout is required
-  def update(cocina_object:, file_uploads:, version:, version_date:, must_version:)
+  def update(cocina_object:, file_uploads:, version:, version_date:)
     version_metadata = VersionedFilesService::VersionMetadata.new(withdrawn: false, date: version_date)
-    VersionedFilesService.new(druid:).migrate(version_metadata:) if migrate_to_versioned_layout?(must_version)
+    VersionedFilesService.new(druid:).migrate(version_metadata:) if versioned_files_enabled? && !(new_object? || already_versioned_layout?)
 
-    if use_versioned_layout?
+    if versioned_files_enabled?
       VersionedFilesService.new(druid:).update(version:,
                                                version_metadata:,
                                                cocina: cocina_object,
@@ -31,7 +30,6 @@ def update(cocina_object:, file_uploads:, version:, version_date:, must_version:
                                                file_transfers: file_uploads)
       # Writes to purl. In the future when PURL Application can handle versioned layout, this will be removed.
       UpdatePurlMetadataService.new(purl).write! if legacy_purl_enabled?
-
     else
       # Writes to stacks with unversioned layout.
       UpdateStacksFilesService.write!(cocina_object, file_uploads) unless cocina_object.collection?
@@ -71,33 +69,11 @@ def legacy_purl_enabled?
     Settings.features.legacy_purl
   end
 
-  def use_versioned_layout?
-    return false unless versioned_files_enabled?
-
-    # Use versioned layout (1) if the object is already using the versioned layout; (2) if the object is new; or
-    # (3) if the object is using the unversioned layout, but DSA indicates that the object is versioned.
-    # 3 may be the case for existing H2 objects, as they were previously unversioned but versions are being added.
-
-    # TODO: Support DSA indicating if an object is versioned.
-
-    # Is it already in versioned layout?
-    return true if already_versioned_layout?
-    # Does the object already exist and is versioned?
-    # The presence of the Stacks object directory indicates that it is versioned.
-    # For example, /stacks/bc/123/df/4567/bc123df4567 indicates that versioned layout is being used.
-    # /stacks/bc/123/df/4567 but NOT bc123df4567 indicates that unversioned layout is being used.
-    return true unless DruidTools::PurlDruid.new(druid, Settings.filesystems.stacks_root).pathname.exist?
-
-    false
-  end
-
-  def migrate_to_versioned_layout?(must_version)
-    return false unless versioned_files_enabled?
-
-    !already_versioned_layout? && must_version
-  end
-
   def already_versioned_layout?
     VersionedFilesService.versioned_files?(druid:)
   end
+
+  def new_object?
+    !DruidTools::PurlDruid.new(druid, Settings.filesystems.stacks_root).pathname.exist?
+  end
 end
diff --git a/spec/requests/v1/publish_dro_spec.rb b/spec/requests/v1/publish_dro_spec.rb
index a2953cd4..4812d35e 100644
--- a/spec/requests/v1/publish_dro_spec.rb
+++ b/spec/requests/v1/publish_dro_spec.rb
@@ -12,13 +12,11 @@
     {
       object: dro.to_h,
       file_uploads:,
-      must_version:,
       version:,
       version_date: version_date.iso8601
     }.to_json
   end
   let(:file_uploads) { { 'file2.txt' => 'd7e54aed-c0c4-48af-af93-bc673f079f9a', 'files/file2.txt' => '7f807e3c-4cde-4b6d-8e76-f24455316a01' } }
-  let(:must_version) { false }
   let(:version) { '1' }
   let(:version_date) { DateTime.now }
 
@@ -108,29 +106,7 @@
       # rubocop:enable RSpec/ExpectActual
     end
 
-    context 'when versioned files is enabled and object already exists' do
-      before do
-        allow(Settings.features).to receive(:versioned_files).and_return(true)
-        FileUtils.mkdir_p('tmp/stacks/bc/123/df/4567')
-      end
-
-      it 'creates the resource in unversioned layout' do
-        post '/v1/resources',
-             params: request,
-             headers: { 'Content-Type' => 'application/json', 'Authorization' => "Bearer #{jwt}" }
-        expect(response).to be_created
-        expect(File).to exist('tmp/purl_doc_cache/bc/123/df/4567/cocina.json')
-        expect(File).to exist('tmp/purl_doc_cache/bc/123/df/4567/public')
-        expect(File).to exist('tmp/stacks/bc/123/df/4567/file2.txt')
-        expect(File).to exist('tmp/stacks/bc/123/df/4567/files/file2.txt')
-        expect(File).not_to be_symlink('tmp/stacks/bc/123/df/4567/file2.txt')
-        expect(File).not_to be_symlink('tmp/stacks/bc/123/df/4567/files/file2.txt')
-      end
-    end
-
-    context 'when version files is enabled and must_version is true' do
-      let(:must_version) { true }
-
+    context 'when version files is enabled' do
       let(:versioned_files_service) { instance_double(VersionedFilesService, migrate: true, update: true) }
 
       let(:version_metadata) { VersionedFilesService::VersionMetadata.new(withdrawn: false, date: version_date) }
@@ -142,6 +118,8 @@
       end
 
       it 'performs a migration before updating the resource' do
+        FileUtils.mkdir_p('tmp/stacks/bc/123/df/4567')
+
         post '/v1/resources',
              params: request,
              headers: { 'Content-Type' => 'application/json', 'Authorization' => "Bearer #{jwt}" }