License or examination fees shall be paid to the department at the time of application as follows: (1) For examination as a registered hairdresser and cosmetician, the sum of one hundred dollars; and (2) for renewal of any hairdresser and cosmetician license, the sum of one hundred dollars. Each person engaged in the occupation of registered hairdresser and cosmetician shall, at all times, conspicuously display such person’s license within the place where such occupation is being conducted. All hairdresser and cosmetician licenses, except as otherwise provided in this chapter, shall be renewed once every two years and shall expire in accordance with the provisions of section 19a-88. No person shall carry on the occupation of hairdressing and cosmetology after the expiration of such person’s license until such person has made application to the department for the renewal of such license. Such application shall be in writing, addressed to the department and signed by the person applying for such renewal. The department may renew any hairdresser and cosmetician license if application for such renewal is received by the department within ninety days after the expiration of such license.