All operating obligations of any component former school district contracted for current operating expenses after June 30, 1966, shall continue to be an obligation of the taxable property within such former component school district. In levying and assessing taxes for the first school year of operation, the interim operating committee, and in levying and assessing such taxes for each subsequent school year, the board of school directors of the newly established school district, shall levy and assess, upon the taxable property within such component former school district, a tax in addition to all other school district taxes, in an amount sufficient to discharge the obligation for operating expenses--probably in a period of ten years.