When you set up your chapter's requirements you had the opportunity to enable the "Differentiate External" option. This option allows for you to track member's activity for this requirement in two categories, internal hours/points done with the chapter, and external hours/points done outside the chapter. This is most commonly used for service/philanthropy hours to help designate service hours done as a chapter or service hours done with other organizations or as an individual.
You are able to configure the system to either allow or disallow individual members from recording their own internal hours/points. If this option is set to "disallow" then members can only acquire hours/points by attending your chapter's events. If it is set to "allow" then members will be able to record their own hours/points and designate them internal or external themselves from their records page.
This option is configurable on the Manage > Update Account Types & Privileges page. From here you can set this option uniquely for each Account Type and for each requirement. From the list of Account Types click on the lock icon to access that Account Type's set of privileges. Then at the bottom you will see the option to "allow" or "disallow" members of this Account Type to record their own internal hours/points.