Local funds made available to the junior colleges or supporting funds allocated in support of the Mississippi Junior College Vocational and Technical Training Law of 1964, or both, may be used to supplement any other funds that may now be, or that may hereafter become, available for the purposes of carrying out the intent of said law. In no event, however, shall any expenditures be made under the provisions of said law unless the amount of local funds involved shall be equal to or exceed the amount of state funds made available for the projects or programs involved.