The secretary of state may include in the election costs to be allocated pursuant to RCW 80.52.050(5) any of the following types of charges:

(1) That portion of the salaries, wages, and benefits for regular employees (other than the secretary of state) and part-time or temporary employees which is directly attributable to the preparation and distribution of the voters pamphlet or other aspects of the administration and conduct of the major public energy project bond election;

(2) That portion of the cost of office supplies, equipment, telephones, postage, freight, travel, and data processing which is equal to the total of such costs multiplied by the ratio of the number of employee hours of the employees of the administrative division and the elections division of the office of the secretary of state directly attributable to the major public energy project bond measure and the total number of employee hours for such employees over the same period of time;

(3) That portion of the costs of typesetting, composition, printing, postage, and distribution of the voters pamphlet which is equal to the total of such costs multiplied by the ratio of the number of pages of the pamphlet directly attributable to the major public energy project bond measure and the total number of pages in the pamphlet; and

(4) The costs of any litigation related to the administration and conduct of a special election on a major public energy project bond measure other than for such actions which have been commenced prior to July 1, 1982.

The secretary of state shall include a detailed summary of any costs attributable to the major public energy project bond measure in one or more of the billings for the public agency which requested the election.