Any individual who is employed by the Center on or after the date of enactment of this Act [December 21, 2000], shall be deemed an employee under section
8901
(1) of title
5 for purposes of health insurance coverage under chapter 89 of such title. An individual who is an employee of the Center on the date of enactment of this Act may elect coverage under this subsection before the 60th day after the date of enactment of this Act, and during such periods as determined by the Office of Personnel Management for employees of the Center employed after such date.