depends on what your union contract says. Here in the Atlanta Division (Local 1996), if you average 12 hours a week you qualify for the ancillary plan (Dental and Vision ONLY). Average 18 hours or more you qualify for part-time health insurance (usually Kaiser Permanente PPO). Average 32 plus hours you qualify for Full-time health insurance. (Blue-Cross HMO)
yes after a year of employment is when you qualify for the benefits in the Atlanta Division. If you have reached your anniversary date I would either talk with your AA or call you union representative to see if you can request an mid year enrollment packet.