Both the senate and the House of Representatives have formal and informal qualifications for members. What is the main difference between formal and informal qualifications

Formal qualifications are specific requirements established by law or the constitution that must be met in order to be eligible for a certain position, such as age, citizenship, and residency requirements. Informal qualifications, on the other hand, are unwritten or unofficial expectations or characteristics that are generally considered important for holding a certain position, such as leadership ability, communication skills, and political experience. The main difference between formal and informal qualifications is that formal qualifications are legally mandated and clearly defined, while informal qualifications are subjective and based on societal norms or expectations.