Any licensed repairman who elects to use initials, abbreviations, trademarks or logos in lieu of his or its full company name, may only do so by first notifying the Commissioner, in writing, in duplicate, of its intention to do so. Said notification must contain an exact replica of the initials, abbreviations, trademark or logo desired. If approved by the Commissioner, one copy of said notification will be returned by the Commissioner to the licensed repairman. The license number must be used in conjunction with said initials, abbreviation, trademark or logo.