(1) The state liquor control board as an administrative agency created by the legislature may exercise only such power as is conferred upon it by the legislature. (Opinion p. 4.) (2) The authority of the liquor control board to adopt administrative rules and regulations which has been expressly granted by the legislature is limited to carrying out the provisions of the liquor act. (Opinion pp. 5-9.) (3) There are four general guidelines which have been established by the courts (Opinion pp. 8-9) against which the validity of any proposed rule or regulation of an administrative agency should be tested.