Triggered by squabbling among separatist factions which hold power in Catalonia's regional assembly, the 72-63 win in the vote serves as a show of unity as local leaders try to push ahead with secession plans.
The wealthy north-eastern region's premier, Carles Puigdemont, has said a victory in the win would accelerate his government's proposals to construct an independent Catalan state, with or without Spain's consent.
(Reporting by Sam Edwards; Writing by Angus Berwick; Editing by Julien Toyer)