For purposes of classification under RSA 100-A, any person who is or becomes the bureau chief for emergency preparedness with the department’s division of health public services, shall be included in the definition of group II under N.H. Rev. Stat. § 100-A:1, VII(h) and VIII(c) under the retirement system, provided that, notwithstanding N.H. Rev. Stat. § 100-A:1, VII(h) or VIII(c), any person not already a group II member for at least 10 years during or prior to his or her appointment shall be eligible for or remain as a group I member for the duration of service as the bureau chief for emergency preparedness.