diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 32c90e489..62f7707fc 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -48,6 +48,8 @@ class Procedure < ApplicationRecord
   validates :description, presence: true, allow_blank: false, allow_nil: false
   validate :check_juridique
 
+  before_save :update_juridique_required
+
   include AASM
 
   aasm whiny_persistence: true do
@@ -343,6 +345,11 @@ class Procedure < ApplicationRecord
 
   private
 
+  def update_juridique_required
+    self.juridique_required ||= (cadre_juridique.present? || deliberation.attached?)
+    true
+  end
+
   def clone_attachment(cloned_procedure, attachment_symbol)
     attachment = send(attachment_symbol)
     if attachment.attached?
@@ -357,7 +364,7 @@ class Procedure < ApplicationRecord
   end
 
   def check_juridique
-    if cadre_juridique.blank? && !deliberation.attached?
+    if juridique_required? && (cadre_juridique.blank? && !deliberation.attached?)
       errors.add(:cadre_juridique, " : veuillez remplir le texte de loi ou la délibération")
     end
   end
diff --git a/db/migrate/20180601084546_add_juridique_required_column_to_procedure.rb b/db/migrate/20180601084546_add_juridique_required_column_to_procedure.rb
new file mode 100644
index 000000000..3c915b158
--- /dev/null
+++ b/db/migrate/20180601084546_add_juridique_required_column_to_procedure.rb
@@ -0,0 +1,5 @@
+class AddJuridiqueRequiredColumnToProcedure < ActiveRecord::Migration[5.2]
+  def change
+    add_column :procedures, :juridique_required, :boolean, default: true
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 92e8ce361..60d35fb86 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2018_05_30_095508) do
+ActiveRecord::Schema.define(version: 2018_06_01_084546) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -482,6 +482,7 @@ ActiveRecord::Schema.define(version: 2018_05_30_095508) do
     t.integer "duree_conservation_dossiers_dans_ds"
     t.integer "duree_conservation_dossiers_hors_ds"
     t.string "cadre_juridique"
+    t.boolean "juridique_required", default: true
     t.index ["hidden_at"], name: "index_procedures_on_hidden_at"
     t.index ["parent_procedure_id"], name: "index_procedures_on_parent_procedure_id"
     t.index ["service_id"], name: "index_procedures_on_service_id"
diff --git a/lib/tasks/2018_06_01_optional_juridique_for_legacy_procedures.rake b/lib/tasks/2018_06_01_optional_juridique_for_legacy_procedures.rake
new file mode 100644
index 000000000..dbc65d586
--- /dev/null
+++ b/lib/tasks/2018_06_01_optional_juridique_for_legacy_procedures.rake
@@ -0,0 +1,5 @@
+namespace :'2018_06_01_optional_juridique_for_legacy_procedures' do
+  task set: :environment do
+    Procedure.all.update_all(juridique_required: false)
+  end
+end
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index ac091cb6d..c09e823c1 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -193,6 +193,12 @@ describe Procedure do
         end
       end
     end
+
+    context 'when juridique_required is false' do
+      let(:procedure) { build(:procedure, juridique_required: false, cadre_juridique: nil) }
+
+      it { expect(procedure.valid?).to eq(true) }
+    end
   end
 
   describe '#types_de_champ_ordered' do
@@ -671,4 +677,30 @@ describe Procedure do
 
     it { expect(Champ.count).to eq(0) }
   end
+
+  describe '#juridique_required' do
+    it 'automatically jumps to true once cadre_juridique or deliberation have been set' do
+      p = create(
+        :procedure,
+        juridique_required: false,
+        cadre_juridique: nil,
+      )
+
+      expect(p.juridique_required).to be_falsey
+
+      p.update(cadre_juridique: 'cadre')
+      expect(p.juridique_required).to be_truthy
+
+      p.update(cadre_juridique: nil)
+      expect(p.juridique_required).to be_truthy
+
+      p.update_columns(cadre_juridique: nil, juridique_required: false)
+      p.reload
+      expect(p.juridique_required).to be_falsey
+
+      allow(p).to receive(:deliberation).and_return(double('attached?': true))
+      p.save
+      expect(p.juridique_required).to be_truthy
+    end
+  end
 end