It is indeed possible to change the constution, but:
1) You need 3/5ths of the camera to do so.
2) There is only one significant state-wide party supporting self determination (podemos, which a very young party that entered the scene only in the last election).
3) The major parties (PP and PSOE, which would be like the republicans and democrats in the state) are both overtly against self determination.
In any case, having to change the constitution amounts to having to get the support of 3/5ths of spain. This is hardly self-determination, don't you think?
It is indeed possible to change the constution, but:
1) You need 3/5ths of the camera to do so.
2) There is only one significant state-wide party supporting self determination (podemos, which a very young party that entered the scene only in the last election).
3) The major parties (PP and PSOE, which would be like the republicans and democrats in the state) are both overtly against self determination.
In any case, having to change the constitution amounts to having to get the support of 3/5ths of spain. This is hardly self-determination, don't you think?