To assign a security rule to a document, navigate to the document settings for your document and select the Security Rules tab.
Settings are the tabbed section on the Manage screen of your document.
At the top you can select a security rule from the Current Security Rule drop-down list. All security rules that have been created in your account will be available in the Current Security Rule drop-down list.
You can select a security rule to use when you publish your version. However, it is recommended that these settings are applied and tested before publishing.