1. Prior to working at a VITA/TCE site, ALL VITA/TCE volunteers (greeters, client facilitators, tax preparers, quality reviewers, etc.) must: CA. Annually pass the Volunteer Standards of Conduct (VSC) certification test with a score of 80% or higher. B. Sign and date the Form 13615, Volunteer Standards of Conduct Agreement, agreeing to comply with the VSC by upholding the highest ethical standards. OC. Pass the Advanced tax law certification. OD. All of the above. E. Both A and B