Enrollment of Enrollees. Company shall enroll Enrollees prior to the onset of the Contract and update such information monthly or more frequently if selected by Company thereafter during the Contract Term. This enrollment or update shall be accomplished by Company supplying to Delta Dental a listing of all Primary Enrollees, on enrollment cards furnished by Delta Dental, by entry on a returned billing statement, by magnetic tape, or in such other format selected by Company and approved by Delta Dental. Such listing or format shall include the full names and the Enrollee ID numbers of the Primary Enrollees and whether they are single or have Dependents if eligibility is extended to them under Paragraph B of this Article.