Maryland Statutes
Subtitle 4 - Petroleum Transporters
Section 10-408 - Vehicle Certificate Required

Each petroleum transporter:
        (1)    shall keep for inspection a manufacturer’s certificate of origin that shows the measured calibration by pots or compartments for each vehicle that meets the definition of a conveyance; or
        (2)    if such a certificate is unavailable, shall get and keep for inspection at the request of the Comptroller a certificate from a governmental unit or professional engineer.