Spain is suggested as one possible "de facto" federation as it grants more self-government to its autonomous communities than are retained by the constituent entities of most federations. For the Spanish parliament to revoke the autonomy of regions such as Galicia, Catalonia or the Basque Country would be a political near-impossibility, though nothing bars it legally. The Spanish parliament has, however, suspended the autonomy of Catalonia in response to the Catalan declaration of independence, in the lead up to the 2017 Catalan election. Additionally, some autonomies such as Navarre or the Basque Country have full control over taxation and spending, transferring a payment to the central government for the common services (military, foreign relations, macroeconomic policy). For example, scholar Enrique Guillén López discusses the "federal nature of Spain's government (a trend that almost no one denies)." Each autonomous community is governed by a Statute of Autonomy ("Estatuto de Autonomía") under the Spanish Constitution of 1978.