To assign a security rule to a publication, navigate to the publication settings for your publication and select the Security Rules tab.
Publication settings are the tabbed section on the Manage screen of your publication.
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 also select the security rule you would like to use when publishing, however, it is recommended that these settings are applied and tested before publishing.