Real Decreto número 1256/90 de 11/10/1990, sobre limitación de emisiones sonoras de los aviones de reacción subsónicos civiles. Boletín Oficial del Estado número 250 de 18/10/1990 Página 30531 (Marginal 25095)

This Royal Decree establishes limits on noise emissions from civilian subsonic jet aircraft. It aims to reduce noise pollution affecting communities near airports. The regulation impacts aircraft manufacturers, airlines, and airport operators. Compliance ensures quieter operations and improved living conditions for residents.