US lawPuerto RicoRegulationsDepartamento del Trabajo y Recursos HumanosRegl. 1277, art. 111.10b — and Rule 111.10c may be used111.10bRegl. 1277, art. 111.10band Rule 111.10c may be usedLast amended: 2005Length: 9 wordsOfficial source Cite as Reglamento Núm. 1277, Art. 111.10bin lieu of hoistway door unlocking devices if desired.