Spinal cord impairment is determined under the following classes: (a) Class 1: 15% when the worker has spinal cord damage but is able to carry out the activities of daily living independently. (b) Class 2: 35% when the worker is a paraplegic and requires assistive measures or devices for any of the activities of daily living. (c) Class 3: 50% when the worker is a quadriplegic and requires assistiv