When This Plan is a Primary Plan, its benefits are determined before those of the other plan and without considering the other plan's benefits.
When This Plan is a Secondary Plan, its benefits are determined after those of the other plan and may be reduced because of the other plan's benefits.
When there are more than two plans covering the person, This Plan may be a Primary Plan as to one or more other plans, and may be a Secondary Plan as to a different plan or plans.
18 Del. Admin. Code § app A § 1307-A-II