The city manager shall promptly make an investigation of the facts stated in the applications filed pursuant to section 80-53 and shall make a written memorandum of his findings, which shall be kept in his office for the benefit of any interested party. If the city manager finds that the applicant is at least 18 years of age, has a valid driver's license to operate a public vehicle and has submitted an application which is truthful, independently verifiable and complete, has not been convicted within the last ten years of a specified criminal offense or any felony punishable under the laws of the United States and has not committed any of the actions specified in subsections (b)(1) or (b)(4) of section 80-57 within the 12-month period immediately preceding the date of application, the city manager shall issue the applicant a permit card. The permit card shall contain the name, home address, business address, employer, and a photograph of the applicant, which permit card must be posted in a conspicuous place in any public vehicle while being operated by or in charge of the applicant. If the city manager does not find that the applicant possesses the qualifications to operate public vehicles upon the streets of the city, he shall refuse to issue such permit.