The director may promulgate rules for determining the qualifications of the applicant for a weighmaster license. He may pass upon the qualifications of the applicant on the basis of the information supplied in the application, or he may examine the applicant orally or in writing, or both, for the purpose of determining his qualifications. He shall grant the weighmaster license to those applicants who possess the qualifications required by Sections 4 [57-18-4 N.M. Stat. Ann.] and 6 [this section] of the Weighmaster Act. The director shall keep a record of all applications and of all licenses issued.