See id. at 4. Billinger also challenges the Board's assertion that it lacks jurisdiction to review the Human Resources Specialist's certification that he had no unused sick leave covered under a formal leave system. OPM responds that Billinger was not entitled to include his unused sick leave in the computation of his CSRA benefits, as he was not covered under a formal leave system. OPM further contends that the Board lacks jurisdiction to review an employing agency's certification regarding retirement matters. OPM argues that Billinger is not covered by a formal leave system established pursuant to legislation.
Sick leave is accrued monthly. . . .
In general, unused sick leave can be carried over from one year to the next. Likewise, Joint Committee memoranda state that staff members are granted ten days of sick leave each year, and that sick leave is carried over from one year to the next. The only other support that OPM offers for its position that Billinger is not covered by a formal leave system, relied on in part by the Board, is the certification by the Human Resources Specialist of the U.S. House of Representatives that Billinger had no unused sick leave covered under a formal leave system. Here, the OPM's reliance on the Human Resources Specialist's certification constitutes an agency determination that affects Billinger's rights under the CSRS, and it is therefore reviewable by the Board. Such is the case here, and the Board erred in concluding that it lacked jurisdiction.