SECTION 2

1. The sale and hire of machinery of which the dangerous parts specified in paragraphs 3 and 4 of this Article are without appropriate guards shall be prohibited by national laws or regulations or prevented by other equally effective measures. 2. The transfer in any other manner and exhibition of machinery of which the dangerous parts specified in paragraphs 3 and 4 of this Article are without appropriate guards shall, to such extent as the competent authority may deter mine, be prohibited by national laws or regulations or prevented by other equally effective measures : Provided that during the exhibition of machinery the tempo rary removal of the guards in order to demonstrate the machinery shall not be deemed to be an infringement of this provision as long as appropriate precautions to prevent danger to persons are taken. 3. All set-screws, bolts and keys, and, to the extent prescribed by the com petent authority, other projecting parts of any moving part of machinery also liable to present danger to any person coming into contact with them when they are in motion, shall be so designed, sunk or protected as to prevent such danger. 4. All flywheels, gearing, cone and cylinder friction drives, cams, pulleys, belts, chains, pinions, worm gears, crank arms and slide blocks, and, to the extent prescribed by the competent authority, shafting (including the journal ends) and other transmission machinery also liable to present danger to any person coming into contact with them when they are in motion, shall be so designed or protected as to prevent such danger. Controls also shall be so designed or protected as to prevent danger.