(a)
safety and/or health signs means signs referring to a specific object, activity or situation and providing information or instructions about safety and/or health at work by means of a signboard, a colour, an illuminated sign or acoustic signal, a verbal communication or a hand signal, as the case may be;
(b)
prohibition sign means a sign prohibiting behaviour likely to incur or cause danger;
(c)
warning sign means a sign giving warning of a hazard or danger;
(d)
mandatory sign means a sign prescribing specific behaviour;
(e)
emergency escape or first-aid sign means a sign giving information on emergency exits or first-aid or rescue facilities;
(f)
information sign means a sign providing information other than that referred to in (b) to (e);
(g)
signboard means a sign which provides specific information by a combination of a geometric shape, colours and a symbol or pictogram and which is rendered visible by lighting of sufficient intensity;
(h)
supplementary signboard means a signboard used together with one of the signs described under (g), which provides supplementary information;
(i)
safety colour means a colour to which a specific meaning is assigned;
(j)
Symbol or pictogram means a figure which describes a situation or prescribes specific behaviour and which is used on a signboard or illuminated surface;
(k)
illuminated sign means a sign produced by a device made of transparent or translucent materials which are illuminated from the inside or the rear in such a way as to give the appearance of a luminous surface;
(l)
acoustic signal means a coded sound signal which is released and transmitted by a device designed for that purpose, without the use of a human or artificial voice;
(m)
verbal communication means a predetermined spoken message communicated by a human or artificial voice;
(n)
hand signal a movement and/or position of the arms and/or hands, in coded form, for guiding persons who are carrying out manoeuvres which constitute a hazard or danger for workers.