by fifty-five per cent of the legal voters of each district affected." The districts affected are the school districts whose boundaries will be changed. This interpretation of the language "each district affected" appears to have been decided in Cowles v. School District No. 6, 23 Neb. 655, 37 N.W. 493, 495, wherein it is said: "In other words, it is the district in its entirety, before the change of boundary, from which the petition is to come, and one-third of the legal voters of which must sign it."
The laws of this state leave the control of the boundaries of school districts with the legal voters of each district. After the original organization of a school district no new district can be formed, old one altered, or the boundariesfor a collateral attack.
Complaint is made also that the petition of the members of the Bridgeport district was not filed until March 31, 1958. This was a date prior to the hearing before the county superintendent. The record shows that the proposed transfer to the Bridgeport district was accepted by its school board on February 13, 1958, but that the formal petition was not filed until March 31, 1958. This is also an irregularity that may not be collaterally attacked.
It is next contended that the notice of hearing given by the county superintendent was insufficient and voids the proceedings in that personal service was not had upon the plaintiffs, pursuant to sections 25-520.01 to 25-520.04, R.S.Supp. 1957. The applicable portion of section 25-520.01, R.S.Supp.1957, provides: "In any action