Whenever any district acquires existing facilities from a publicly or privately owned public utility, either in proceedings by eminent domain or otherwise, to the extent necessary for operation of facilities, all of the employees of such public utility whose duties pertain to the facilities acquired who have been employed by said utility for at least seventy-five (75) days shall be appointed to comparable positions in the district without examination and shall be governed thereafter by the personnel system adopted by the board, and these employees shall be given sick leave, seniority and vacation credits in accordance with the records of the acquired public utility.

The provisions of this section shall apply only to those officers or supervisory employees of the acquired utility as shall be designated by the board.