For both Aetna and Delta dental, eligible dependents include husband or wife, domestic partner, and dependent children until their 26th birthday.
Newly acquired dependents, (birth, adoption, marriage) can be added to your Dental plan within 60 days of the date of the event. You can also enroll dependents during the annual open enrollment period.
Dependents can be removed when they lose eligibility (age 26, loss of dependent status, divorce, etc), or during the annual open enrollment period.
My spouse was just hired by the County and is therefore required to enroll in a dental plan. Can I remove him/her from my dental plan outside of the open enrollment period?
Yes, this is a qualifying event and therefore you do not have to wait for open enrollment.