The PSOE's pact to transfer immigration competences to Catalonia is of great importance and symbolism.
This concession will be a significant loss for the Spanish state as control of the borders is a basic competency for any country.
This proposed law can be seen as a further step in the path towards Catalonia's independence.
Immigration is seen by Puigdemont as a threat to the 'Catalonian identity' and the 'cohesion' of its society.
This legislation could allow Catalonia to control not only its safety, but also its borders, ports and airports, and the ability to decide who is and who is not a citizen.
These steps could pave the way for a new attempt at secession.
The government is a step away from handing over fiscal control to the region through a 'singular financing', which would significantly extend its autonomy.
Conclusion: The government is moving towards a confederal system, which would imply a deep structural change resulting in a significant transfer of power to Catalonia.