The date of joining and the date of registration with the public health insurance fund are recorded in these fields. Joining describes the start of the insurance, i.e. the date on which the person’s insurance cover began. This is usually the same day as the day on which the person started working at the named company. However, employers had a certain grace period for registering civilian forced laborers with a public health insurance fund. The registration date may therefore be later than the joining date.