Orden de 27/11/1997, por la que se regula el horario legal en los años 1998, 1999, 2000 y 2001. Boletín Oficial del Estado número 287 de 01/12/1997 Página 35339

This order sets the legal time for Spain for the years 1998, 1999, 2000, and 2001. It ensures consistent timekeeping across the country during these years. This affects all residents and businesses in Spain, standardizing daily schedules and coordination for all activities.