Classified employees in the management unit certified by the Board, who are determined to be supervisory employees as defined by section 902 of this title and who are not determined to be managerial or confidential employees as defined by section 902 of this title, shall remain members of that unit, which shall hereinafter be referred to as the "supervisory" unit. Employees who are determined to be supervisory employees under the provisions of section 906 of this title shall become members of the supervisory unit. A representative election shall not be required as a result of this change. (Added 1971, No. 193 (Adj. Sess.), § 19, eff. April 3, 1972; amended 1977, No. 109, § 5b, eff. July 3, 1977.)