Accredited Investor Definition Review Act This bill revises who may be considered an accredited investor for purposes of participating in private offerings of securities. Certain unregistered securities may only be offered to accredited investors. Specifically, the bill allows the Securities and Exchange Commission (SEC) discretion in determining what certifications, designations, or credentials investors must possess for purposes of investor protection, provided that the credentials are at least as broad as the existing regulations. Additionally, the SEC must review these credentials every five years.