A trust is not exclusively for charitable purposes, within the meaning of RCW
11.110.040, when the instrument creating it contains a trust for several or mixed purposes, and any one or more of such purposes is not charitable within the meaning of RCW
11.110.020, as enacted or hereafter amended. Such instrument shall be withheld from public inspection by the secretary of state and no information as to such noncharitable purpose shall be made public. The attorney general shall have free access to such information.