Membership of Tosini implies the members' ongoing commitment to:

• Professional and ethical conduct that reflects credit on the individual teacher and the profession as a whole
• Competence, honesty and integrity in all dealings with students and other members of the singing and allied professions
• Truth and avoidance of ambiguity in their statement of qualifications
• The realistic appraisal of a student's ability as a singer
• The avoidance of careless or malicious injury, whether directly or indirectly, to the reputation, prospects or business of other members
• The abstention from proselytising the students of other teachers
• The active development of his or her skills and vocational knowledge in the pursuit of professional excellence