49. Notwithstanding sections 47 and 48 and subject to the specific provisions to that effect prescribed in the master policy for the insurance plan listed in subparagraphs 1 and 2 of section 62, a senior administrator who, before becoming a senior administrator governed by this Regulation, was employed by an employer in the public and parapublic sectors and was eligible for a group insurance plan applicable to the employees of those sectors, is eligible for the insurance plans provided for in this chapter on the date he takes over his duties as a senior administrator covered by this Regulation, provided that his previous employment ended less than 30 days before the date he takes over his duties and he provides proof of his previous employment.