Real Decreto 863/2003, de 4 de julio, por el que se aprueba la Norma de calidad para la elaboracion, comercializacion y venta de confituras, jaleas, "marmalades" de frutas y crema de castanas BOE n° 160 de 05/07/2003 p. 26175

This Royal Decree establishes quality standards for the production, marketing, and sale of fruit jams, jellies, marmalades, and chestnut creams. It aims to ensure product consistency and consumer information. These regulations affect manufacturers, distributors, and retailers of these food products. Consumers benefit from clear labeling and assured quality of the specified fruit preserves.