Membership in the Lions Club is by "invitation only" as mandated by its constitution and by-laws. All member applicants need a sponsor who is an active member and of good standing in the club they intend to join. While sponsorship may be obtained by an applicant in order to become a legitimate member, sponsorship is no guarantee of membership. Acceptance of membership is still subject to the approval of the majority of the club's board of directors. A Lions Club chooses its members diligently as it requires time and financial commitments. Prospective applicants must be a person of good moral character in his or her community. Attendance at meetings is encouraged on a monthly or fortnightly basis. Due to the hierarchical nature of Lions Clubs International, members have the opportunity to advance from a local club to an office at the zone, district, multiple district, and international levels.