diff --git a/app/controllers/customer_appointments_controller.rb b/app/controllers/customer_appointments_controller.rb
index c513d91..8c8aa88 100644
--- a/app/controllers/customer_appointments_controller.rb
+++ b/app/controllers/customer_appointments_controller.rb
@@ -12,7 +12,8 @@ class CustomerAppointmentsController < ApplicationController
   before_action :require_login
   before_action :find_project, except: [:index]
   before_action :find_appointment, only: [ :show, :edit, :update, :destroy ]
-  #before_action :authorize
+  # This tells Redmine to check global permissions for the current controller/action
+  before_action :authorize_global
 
   helper :projects
 
diff --git a/app/views/common/_calendar.html.erb b/app/views/common/_calendar.html.erb
index 3fa900c..453b01f 100644
--- a/app/views/common/_calendar.html.erb
+++ b/app/views/common/_calendar.html.erb
@@ -197,15 +197,17 @@
             </span>
 
             <!-- Center: New Appointment Action -->
-            <span class="day-num-center" style="display: inline-flex; align-items: center; justify-self: center;">
-              <%# Only show ADD button if it's in the future, NOT a weekend, and NOT a custom holiday %>
-              <% if day >= User.current.today && !is_standard_weekend && !is_custom_holiday %>
-                <%= link_to sprite_icon('add'),
-                            new_customer_appointment_path(start_date: day),
-                            class: 'icon-only icon-add',
-                            title: l(:label_appointment_new, default: 'New Appointment') %>
-              <% end %>
-            </span>
+            <% if User.current.allowed_to?(:add_customer_appointments, nil, global: true) %>
+              <span class="day-num-center" style="display: inline-flex; align-items: center; justify-self: center;">
+                <%# Only show ADD button if it's in the future, NOT a weekend, NOT a holiday, AND user has permission %>
+                <% if day >= User.current.today && !is_standard_weekend && !is_custom_holiday && User.current.allowed_to?(:add_customer_appointments, nil, global: true) %>
+                  <%= link_to sprite_icon('add'),
+                              new_customer_appointment_path(start_date: day),
+                              class: 'icon-only icon-add',
+                              title: l(:label_appointment_new, default: 'New Appointment') %>
+                <% end %>
+              </span>
+            <% end %>
 
             <!-- Right: Total Hours -->
             <span class="day-num-right" style="display: inline-flex; align-items: center; justify-self: end;">
diff --git a/app/views/customer_appointments/_customer_actions.html.erb b/app/views/customer_appointments/_customer_actions.html.erb
index a7d8b26..d0f5305 100644
--- a/app/views/customer_appointments/_customer_actions.html.erb
+++ b/app/views/customer_appointments/_customer_actions.html.erb
@@ -1,4 +1,6 @@
-<p>
-<% customer = context[:customer] %>
-<%= link_to l(:label_add_appointment), new_customer_appointment_path(customer_id: customer.id), target: :_blank, id: :appointment_link %>
-</p>
\ No newline at end of file
+<% if User.current.allowed_to?(:add_customer_appointments, nil, global: true) %>
+  <p>
+  <% customer = context[:customer] %>
+  <%= link_to l(:label_add_appointment), new_customer_appointment_path(customer_id: customer.id), target: :_blank, id: :appointment_link %>
+  </p>\
+<% end %>
\ No newline at end of file
diff --git a/app/views/customer_appointments/_tooltip.html.erb b/app/views/customer_appointments/_tooltip.html.erb
index 6b61e8a..2f8307a 100644
--- a/app/views/customer_appointments/_tooltip.html.erb
+++ b/app/views/customer_appointments/_tooltip.html.erb
@@ -92,6 +92,8 @@
 
 <hr>
 
-<p class="buttons">
-  <%= link_to l(:label_open_appointment), customer_appointment_path(appointment), class: "icon icon-edit" %>
-</p>
\ No newline at end of file
+<% if User.current.allowed_to?(:edit_customer_appointments, nil, global: true) %>
+  <p class="buttons">
+    <%= link_to l(:label_open_appointment), customer_appointment_path(appointment), class: "icon icon-edit" %>
+  </p>
+<% end %>
\ No newline at end of file
diff --git a/app/views/customer_appointments/index.html.erb b/app/views/customer_appointments/index.html.erb
index 733dffd..a6eebde 100644
--- a/app/views/customer_appointments/index.html.erb
+++ b/app/views/customer_appointments/index.html.erb
@@ -5,8 +5,10 @@
     <i class="fa-regular fa-calendar-days"></i> <%= l(:button_calendar) %>
   <% end %>
 
-  <%= link_to new_customer_appointment_path do %>
-    <i class="fa-regular fa-pen-to-square"></i> <%= l(:button_add) %>
+  <% if User.current.allowed_to?(:add_customer_appointments, nil, global: true) %>
+    <%= link_to new_customer_appointment_path do %>
+      <i class="fa-regular fa-pen-to-square"></i> <%= l(:button_add) %>
+    <% end %>
   <% end %>
 
 </div>
diff --git a/app/views/customer_appointments/show.html.erb b/app/views/customer_appointments/show.html.erb
index 6ad3250..258a388 100644
--- a/app/views/customer_appointments/show.html.erb
+++ b/app/views/customer_appointments/show.html.erb
@@ -3,16 +3,22 @@
     <i class="fa-regular fa-calendar-days"></i> <%= l(:button_calendar) %>
   <% end %>
 
-  <%= link_to new_issue_path(issue: { customer_id: @appointment.customer_id, vehicle_id: @appointment.vehicle_id, estimate_id: @appointment.estimate_id }), target: :_blank do %>
-    <i class="fa-solid fa-plus"></i> <%= l(:label_new_issue) %>
+  <% if User.current.allowed_to?(:add_customer_appointments, nil, global: true) %>
+    <%= link_to new_issue_path(issue: { customer_id: @appointment.customer_id, vehicle_id: @appointment.vehicle_id, estimate_id: @appointment.estimate_id }), target: :_blank do %>
+      <i class="fa-solid fa-plus"></i> <%= l(:label_new_issue) %>
+    <% end %>
   <% end %>
 
-  <%= link_to edit_customer_appointment_path(@appointment) do %>
-    <i class="fa-solid fa-pen-to-square"></i> <%= l(:button_edit) %>
+  <% if User.current.allowed_to?(:edit_customer_appointments, nil, global: true) %>
+    <%= link_to edit_customer_appointment_path(@appointment) do %>
+      <i class="fa-solid fa-pen-to-square"></i> <%= l(:button_edit) %>
+    <% end %>
   <% end %>
 
-  <%= link_to customer_appointment_path(@appointment), method: :delete, data: { confirm: l(:text_are_you_sure) } do %>
-    <i class="fa-solid fa-trash"></i> <%= l(:button_delete) %>
+  <% if User.current.allowed_to?(:delete_customer_appointments, nil, global: true) %>
+    <%= link_to customer_appointment_path(@appointment), method: :delete, data: { confirm: l(:text_are_you_sure) } do %>
+      <i class="fa-solid fa-trash"></i> <%= l(:button_delete) %>
+    <% end %>
   <% end %>
 </div>
 
@@ -36,20 +42,22 @@
   </span>
 </h2>
 
-<%# Quick Status Action Buttons %>
-<% 
-  statuses = CustomerAppointment::STATUSES 
-  current_status = @appointment.status.to_s.parameterize.underscore
-%>
-<div class="appointment-quick-actions">
-  <span class="quick-action-label"><%= l(:label_change_status, default: 'Change Status:') %></span>
-  <% statuses.reject { |s| s == current_status }.each do |status_key| %>
-    <%= link_to status_key.humanize,
-                customer_appointment_path(@appointment, customer_appointment: { status: status_key }),
-                method: :patch,
-                class: "quick-status-btn status-#{status_key.parameterize}" %>
-  <% end %>
-</div>
+<% if User.current.allowed_to?(:edit_customer_appointments, nil, global: true) %>
+  <%# Quick Status Action Buttons %>
+  <% 
+    statuses = CustomerAppointment::STATUSES 
+    current_status = @appointment.status.to_s.parameterize.underscore
+  %>
+  <div class="appointment-quick-actions">
+    <span class="quick-action-label"><%= l(:label_change_status, default: 'Change Status:') %></span>
+    <% statuses.reject { |s| s == current_status }.each do |status_key| %>
+      <%= link_to status_key.humanize,
+                  customer_appointment_path(@appointment, customer_appointment: { status: status_key }),
+                  method: :patch,
+                  class: "quick-status-btn status-#{status_key.parameterize}" %>
+    <% end %>
+  </div>
+<% end %>
 
 <div class="issue details">
   <div class="attributes">
diff --git a/config/locales/en.yml b/config/locales/en.yml
index ee48c96..d7153ed 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -34,6 +34,7 @@ en:
   field_vehicle: Vehicle
   label_add_appointment: Add Appointment
   label_appointment: Appointment
+  label_appointment_new: "New Appointment"
   label_appointments: Appointments
   label_customer_appointment: Customer Appointment
   label_customer_calendar: Customer Calendar
@@ -43,9 +44,11 @@ en:
   label_end_date: End Date
   label_estimated_hours: Estimated Time
   label_event: Event
+  label_hide_past_weeks: "Hide Past Weeks"
   label_holiday_edit: Edit Holiday
   label_holiday_new: New Holiday
   label_holiday_plural: Holidays
+  label_legend: "Legend"
   label_new_appointment: New Appointment
   label_of: "of"
   label_only_customer_appointments: Show Customer Appointments Only
@@ -65,6 +68,9 @@ en:
   label_week_4th: "4th"
   label_week_last: "Last"
   notice_unable_delete_holiday: "Unable to delete holiday"
+  permission_add_customer_appointments: "Add customer appointments"
+  permission_delete_customer_appointments: "Delete customer appointments"
+  permission_edit_customer_appointments: "Edit customer appointments"
   permission_manage_customer_appointments: Manage Customer Appointments
-  permission_view_customer_appointments: View Customer Appointments
+  permission_view_customer_appointments: "View customer appointments"
   title_customer_appointments: Customer Appointments
\ No newline at end of file
diff --git a/init.rb b/init.rb
index 07a4696..8b14406 100644
--- a/init.rb
+++ b/init.rb
@@ -53,6 +53,13 @@ end
        caption: 'Customer Calendar',
        after: :calendar,
        param: :project_id
+
+  # Global Permissions
+  permission :view_customer_appointments, { customer_appointments: [:index, :show] }, global: true
+  permission :add_customer_appointments, { customer_appointments: [:new, :create] }, global: true
+  permission :edit_customer_appointments, { customer_appointments: [:edit, :update] }, global: true
+  permission :delete_customer_appointments, { customer_appointments: [:destroy] }, global: true
+
 end
 
 Rails.configuration.to_prepare do