71. Is it specified that a particular institution(s) is responsible for investigating money laundering that relates to political parties, candidates and elected officials?
Spain
[...]If nevertheless the irregularity detected suggests a potential instance of corruption, the Court of Audit will immediately report to the law enforcement authorities, as appropriate.
Source: GRECO (2009). Evaluation Report on Spain, Transparency of Party Funding, p 13.
Law enforcement authority.
In the law there is no mention of money laundering. However, corruption is mentioned.