20. Is there a limit on the amount a candidate can contribute to their own election campaign?

Azerbaijan
156.2. Election funds of candidates and registered candidates nominated for a single-mandate constituency may be organized from the following financial resources: [...]
156.2.4. voluntary donations by citizens or legal entities in respective amounts of no more than 3,000 and 50,000 manats;
Source: Article 156.2, Election Code of the Republic of Azerbaijan, 2003 (amended 2017)
191.2. Election funds of presidential candidates shall be formed only from the following financial sources: [...]
191.2.3. voluntary donations of citizens and legal entities which may not exceed 3,000 and 50,000 manats respectively.
Source: Article 156.2, Election Code of the Republic of Azerbaijan, 2003 (amended 2017)
225.1. Election funds of candidates for municipality membership may be formed from the following financial resources: [...]
225.1.4. voluntary donations from citizens not exceeding 500 manats.
225.1.5. voluntary donations of legal entities that are:
• not more than 10,000 manats - for candidates for membership of a municipality mentioned in Article 215.1.1.;
• for candidates for membership of a municipality mentioned in Article 215.1.2, may .not exceed 7,500 manats;
• for candidates for membership of a municipality mentioned in Article 215.1.3, may not exceed 3,750 manats.;
• for candidates for membership of a municipality mentioned in Article 215.1.4, may not exceed 2,500 manats;
• for candidates for membership of a municipality mentioned in Article 215.1.5, may not exceed 1,250 manats;
• for candidates for membership of a municipality mentioned in Article 215.1.6, may not exceed 750 manats;
Source: Article 225.1, Election Code of the Republic of Azerbaijan, 2003 (amended 2017)
The legislation does not mention separate rules for the donation from candidates.