In order to renew a license, the licensee shall submit to the Board satisfactory proof of the completion during the license renewal period of at least 20 clock or credit hours of approved training. Ten of the 20 credit hours of approved training shall be directly related to the category of the license that the individual holds. Each licensee holding two or more licenses issued by the Board may fulfill the continuing education requirements for renewal of all licenses by obtaining a total of 20 hours of approved training. Exemptions. The requirements of §A, of this regulation, may be waived for any of the following: A licensee was issued an initial license during the last 9 months of the license renewal period; A licensee holds an apprentice license; or Other just cause shown.