If my Spanish were better (or my Catalan) I would have googled it myself, unfortunately I would not be able to translate a legal text with specific terminology correctly. I guess checking with the ayuntament is a good idea.
PS: imagine a non profit cannot continue functioning, who pays off the debts? This is one thing to ALWAYS check. A friend of mine wanted to found a non profit and was already signing papers without realising he would be the one who would be paying off debts for years if things go wrong. I don't know if he did anything with the warning and obviously one should not found any organisation with the belief things will go wrong in the end, if you found something you gotta do it with the belief it will be a success. However, it is not unwise to always check ALL rules, just in case ...