Spanish electoral regulations permit freedom of dress when exercising the right to vote. This means citizens can attend polling stations in their preferred attire, such as football team shirts, costumes, or any other outfit, provided it does not break the law.

However, the Electoral Board has previously prohibited the use of garments with slogans that could be considered electoral propaganda. A recent example was the ban on the slogan '¡que te vote Txapote!' during the 2023 general elections, a measure based on Article 93 of the electoral law, which forbids 'electoral propaganda of any kind' in and around polling stations.

The electoral law also stipulates that groups that could hinder access to polling stations must not be formed. Engaging in any form of electoral propaganda can be considered an offense.

Furthermore, Article 144 of the electoral law outlines more severe penalties, which could include up to one year in prison and considerable fines, for those who engage in propaganda activities after the campaign period has ended, or who violate regulations concerning posters, gatherings, and other public propaganda events, especially if they wear clothing or accessories linked to political parties.