to the extent that such service is subject to the Civil Service Retirement System or Federal Employees Retirement System, as appropriate, by applying section 8339(d) of title 5, United States Code, with respect to such service. (D) Rule of construction Nothing in the amendment made by subsection (c) shall be considered to apply with respect to any appointment made before the effective date under paragraph (1). (3) Fees and authorizations of appropriations (A) Fees The Director of the Office of Management and Budget shall adjust fees collected as necessary to ensure collections are sufficient to carry out amendments made in this section. (B) Authorization of appropriations There are authorized to be appropriated such sums as are necessary to carry out this section. (4) Election (A) Incumbent defined For purposes of this paragraph, the term incumbent means an individual who is serving as a Federal Protective Service law enforcement officer on the date of the enactment of this Act. (B) Notice requirement Not later than 30 days after the date of enactment of this Act, the Director of the Office of Personnel Management shall take measures reasonably designed to ensure that incumbents are notified as to their election rights under this paragraph, and the effect of making or not making a timely election. (C) Election available to incumbents (i) In general An incumbent may elect, for all purposes, either— (I) to be treated in accordance with the amendments made by subsection (a) or (b), as applicable