From and after the time this act shall take effect, the treasurer of each county shall immediately as the same are received, pay over to the treasurer of any city, town or village situate within such county thirty per centum of all moneys coming into the hands of such county treasurer and collected from or under any road tax levied for county roads under general laws on the taxable property within the corporate limits of such city, town or village, the proceeds of which tax are not pledged for the payment of certificates of indebtedness or bonds already issued, or not levied to meet the assent of the state of New Mexico to the provisions of the act of congress, approved July 11, 1916, entitled, “An act to provide that the United States shall aid the states in the construction of rural post roads and for other purposes,” under Chapter 38 of the Session Laws of the third state legislative assembly of New Mexico.