It is prohibited to drive a truck of less than 3,500 kg maximum authorized mass (MMA) with a breath alcohol level higher than...

Correct answer: 0.25 milligrams per liter.

A truck with a maximum authorized mass (MMA) of up to 3,500 kg is subject to the general breath alcohol limit of 0.25 mg/l if the driver is an adult who has held a license for more than two years and is not carrying out transport subject to a lower limit, such as carrying dangerous goods. The limit of 0.15 mg/l applies to trucks over 3,500 kg and to novice drivers.

Reglamento General de Circulación — Real Decreto 1428/2003 · Ley sobre Tráfico, Circulación de Vehículos a Motor y Seguridad Vial — RDL 6/2015