When the board of county commissioners shall have entered into a contract for lighting under this act it shall provide for the payment of the cost thereof, including the reasonable cost of serving notices on landowners as hereinbefore provided, by annually, at their regular July meeting, levying special assessments on all property benefited by this act, and such special assessments shall be in such amounts as shall be determined by the board of county commissioners, and as shall be lawful under the statutes of Kansas regulating and concerning rates to be charged for electric service such as that herein provided for.
K.S.A. 19-2728