In determining each weighted average under paragraph (1), the weight to be given to a particular subscription charge shall, with respect to each plan (and option) to which it is to apply, be commensurate with the number of enrollees enrolled in such plan (and option) as of March 31 of the year in which the determination is being made.

For purposes of paragraph (2), the term “enrollee” means any individual who, during the contract year for which the weighted average is to be used under this section, will be eligible for a Government contribution for health benefits.

Except as provided in paragraphs (2), (3), and (4), the biweekly Government contribution for health benefits for an employee or annuitant enrolled in a health benefits plan under this chapter is adjusted to an amount equal to 72 percent of the weighted average under subsection (a)(1)(A) or (B), as applicable. For an employee, the adjustment begins on the first day of the employee’s first pay period of each year. For an annuitant, the adjustment begins on the first day of the first period of each year for which an annuity payment is made.

The biweekly Government contribution for an employee or annuitant enrolled in a plan under this chapter shall not exceed 75 percent of the subscription charge.

In the case of an employee who is occupying a position on a part-time career employment basis (as defined in section 3401(2) of this title), the biweekly Government contribution shall be equal to the percentage which bears the same ratio to the percentage determined under this subsection (without regard to this paragraph) as the average number of hours of such employee’s regularly scheduled workweek bears to the average number of hours in the regularly scheduled workweek of an employee serving in a comparable position on a full-time career basis (as determined under regulations prescribed by the Office).

In the case of persons who are enrolled in a health benefits plan as part of the demonstration project under section 1108 of title 10, the Government contribution shall be subject to the limitation set forth in subsection (i) of that section.

An employee who enters on approved leave without pay to serve as a full-time officer or employee of an organization composed primarily of employees as defined by section 8901 of this title, within 60 days after entering on that leave without pay, may file with his employing agency an election to continue his health benefits enrollment and arrange to pay currently into the Employees Health Benefits Fund, through his employing agency, both employee and agency contributions from the beginning of leave without pay. The employing agency shall forward the enrollment charges so paid to the Fund. If the employee does not so elect, his enrollment will continue during nonpay status and end as provided by paragraph (1) of this subsection and implementing regulations.

in the case of employees generally, from the appropriation or fund which is used to pay the employee;

in the case of an elected official, from an appropriation or fund available for payment of other salaries of the same office or establishment;

in the case of an employee of the legislative branch who is paid by the Chief Administrative Officer of the House of Representatives, from the applicable accounts of the House of Representatives; and

in the case of an employee in a leave without pay status, from the appropriation or fund which would be used to pay the employee if he were in a pay status.

Except as provided in paragraphs (2) and (3), the Government contributions authorized by this section for health benefits for an annuitant shall be paid from annual appropriations which are authorized to be made for that purpose and which may be made available until expended.

The Government contribution for persons enrolled in a health benefits plan as part of the demonstration project under section 1108 of title 10 shall be paid as provided in subsection (i) of that section.