Reglamento General de Seguridad e Higiene Industrial, Cap. VI -- Montacargas de Trabajadores. No incluido en el índice bajo la Ley Núm. 149 de 12 dic, 2005

Escalators pit pans should be periodically cleaned of oil and refuse. The frecuency of cleaning will depend on the service, but should be such as to reduce to a minimum the hazard resulting from accidental ignition. 1000.2d - Tops of Cars