After October 1, 1993, the Board may not accept or approve any application for registration. An individual who has been registered by the Board as a psychiatrist's assistant pursuant to this chapter shall renew the registration every 2 years on the date specified by the Board by re-registration and payment of the appropriate fees. A registrant shall meet all the requirements of this chapter at re-registration. A psychiatrist's assistant shall notify the Board in writing of a change in the psychiatrist’s assistant name or address within 60 days after the change. Notice of the required re-registration shall be given by the Board to the psychiatrist's assistant at the address as shown on the records of the Board. The psychiatrist's assistant shall complete this re-registration by the date specified by the Board. If a psychiatrist's assistant does not receive notice of re-registration it shall be the responsibility of the psychiatrist’s assistant to contact the Board in order to complete this re-registration before the expiration of the current registration. A psychiatrist's assistant whose registration has expired for failure to renew is unregistered. A registration which has expired shall be considered permanently expired. For purposes of the re-registration, appropriate standards for continuing medical education for psychiatrist's assistants may be promulgated by the Board. When the registration expires, the approval of duties and supervision becomes invalid.