A school district shall be organized in form and manner as hereinafter in this chapter provided, and shall be known as . . . . . . (insert here the name of the district) School District No. . . . ., . . . . . . county, state of Washington: PROVIDED, That all school districts now existing as shown by the records of the educational service district superintendent are hereby recognized as legally organized districts: PROVIDED FURTHER, That all school districts existing on April 25, 1969 as shown by the records of the county or intermediate district superintendents are hereby recognized as legally organized districts.