These standards regulate the different attachment points of a harness, defining their specific use. EN 361 - Fall Arrest: this is the only standard that certifies attachment points designed to arrest a free fall. These points, located above the person's center of gravity (sternal and/or dorsal area), must be identified by the letter "A", distribute the impact forces across the body and keep the user in an upright position after a fall. EN 358 - Work Positioning: certifies attachment points, including those located on the sides, lateral. It is used to secure the user to the structure via a lanyard, allowing them to work under tension and hands-free. These attachments are not suitable for use in a fall arrest system. EN 813 - Suspension: certifies the ventral attachment point. It is the specific standard for harnesses designed to support the weight of the user suspended in a sitting position, distributing it between the waist belt and leg loops. This attachment point is not suitable for use in a fall arrest system. A full-body harness can integrate all three certifications, but each attachment point has a completely distinct and non-interchangeable structural and safety function.