30. The elements of the service brake system shall comply with the following standards:(1) all the parts of each brake shall be adequate, securely mounted and none shall be missing or seized-up or show signs of wear adversely affecting their effectiveness;
(2) all the parts other than those referred to in paragraph 1 shall be adequate, securely mounted and none shall be missing or seized-up or show signs of wear adversely affecting their effectiveness;
(3) with or without brake application, there shall be no brake fluid leak, and no vacuum leak with the vacuum boost fully charged;
(4) the lines and the fittings shall be adequate and shall not be crushed, twisted, crimped, abraded or so cracked that the reinforcement cord is exposed, shall not be excessively worn or corroded, bulged, broken or welded and the fittings shall be tight enough to prevent the lines from vibrating or chafing against adjacent parts;
(5) the master cylinder shall be securely mounted, show no signs of internal or external leaks and its reservoir shall be fitted with a cover; furthermore, the brake fluid level shall never be below the minimum level specified by the manufacturer or, where no level is specified, it shall not be lower than 12.5 mm below the edge of the filler opening;
(6) the filter of the air compressor or of the vacuum system shall be present and not be so clogged that performance of the brake system is reduced;
(7) the brake pedal shall be non-slip, securely attached to its rotating axle, properly aligned and it shall operate without excessive friction;
(8) the original antilock system of a road vehicle shall be present and adequate and the warning light shall turn off within the time specified by the manufacturer;
(9) the external components of the parking brake shall neither be worn out in a way that impedes its good working order, nor be missing, misaligned, seized, broken or cracked;
(10) the control device of an electric brake system shall make it possible to brake the towed road vehicle, the cables and electric connections shall neither be worn in a way that hampers the good working order of the brakes or could cause a short-circuit, nor be missing, short-circuited, broken, frayed or cracked and they shall be securely attached to the appropriate fasteners or connection; furthermore, the electric brake circuit shall be independent of any other circuit and shall not be grounded on the hitch;
(11) the air compressor of a fully pneumatic system or of an air-boosted hydraulic system or the vacuum pump shall be securely attached and, if it is belt-driven, the belt shall be free of cuts and kept at the tension determined by the manufacturer;
(12) any manometer indicating air pressure or vacuum in a road vehicle shall be adequate;
(13) the air reservoir of a completely pneumatic system or of an air-boosted hydraulic system shall be adequate, securely mounted and shall be free of cracks, excessive corrosion or welds other than those made by the manufacturer.