This policy setting allows you to manage dynamic binary and script behaviors: components that encapsulate specific functionality ...

"This policy setting allows you to manage dynamic binary and script behaviors: components that encapsulate specific functionality for HTML elements to which they were attached.

If you enable this policy setting, binary and script behaviors are available. If you select Administrator approved in the drop-down box, only behaviors listed in the Admin-approved Behaviors under Binary Behaviors Security Restriction policy are available.

If you disable this policy setting, binary and script behaviors are not available unless applications have implemented a custom security manager.

If you do not configure this policy setting, binary and script behaviors are not available unless applications have implemented a custom security manager."