LAC 55:III.1113. Reference Marking

A. Only a reference headform that is firmly seated with the basic and reference planes horizontal may be used. The completed helmet to be tested shall be placed on the appropriate reference headform, as specified in §1112.A and §1113.B. B. A 10 pound (4.5 kg) static vertical load shall be applied through the helmet's apex. The helmet shall be centered laterally and seated firmly on the reference headform according to its helmet positioning index. C. While maintaining the load and position described in §1113.C, a line shall be drawn (hereinafter referred to as test line) on the outer surface of the helmet coinciding with portions of the intersection of that service with the following planes, as shown in §1131.C.Figure 2: 1. a plane 1 inch (2.5 cm) above and parallel to the reference plane in the anterior portion of the reference headform; 2. a vertical transverse plane 2.5 inches (6.4 cm) behind the point on the anterior surface of the reference headform at the intersection of the mid-sagittal and reference planes; 3. the reference plane of the reference headform; 4. a vertical transverse plane 2.5 inches (6.4. cm) behind the center of the external ear opening in a side view; and 5. a plane 1 inch (2.5 cm) below and parallel to the reference plane in the posterior portion of the reference headform.