All persons employed by the state or any agency thereof or by any city, county or other municipality or by any public school or by any private school, college or university receiving public funds as defined by K.S.A. 75-4308, at the time this act becomes effective shall take and subscribe the oath required by this act and shall file said oath in writing with the appropriate officer designated by K.S.A. 75-4310 on or before January 1, 1969, and any such officer or employee failing so to do shall be subjected to the penalties as in this act prescribed.
K.S.A. 75-4312