The department may issue any certificate of ownership and certificate of number or temporary certificate of number directly or the department may authorize any person to act as agent for the issuance of a certificate of number or temporary certificate of number. If a person accepts such authorization, he may be assigned a block of numbers which upon issuance, in conformity with this chapter and with any rules and regulations of the department, shall be valid as if issued directly by the department. Registration of vessels pursuant to the provisions of this code shall be conducted by the department or by any agent authorized by the department to conduct such
registration.