25 CFR Part 308

4 sections.

§ 308.1
Penalties
§ 308.2
Certificates of genuineness to be attached to trade-marks
§ 308.3
Conditions of eligibility to attach certificates
§ 308.4
Revocation of privilege of attaching certificates

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.