Section 17. \";hat hstron~ents not to he accel)tecl unless presented for registration within t\Gelve mollths after t l ~ e cornillg into operation of this Act

17. \";hat hstron~ents not to he accel)tecl unless presented for registration within t\Gelve mollths after t l ~ e cornillg into operation of this Act. - 1s. What Instri~ments not to be accepted tinless presented for registration witllin four inonths after execution. - 1'3. What Instriun~ents not to be accepted unless l)resentecl for registratio11 wit,hin two months after execution. 20. What Instrl~aleats may be registered at any time.