The power and discretion conferred by law upon the Board to receive and file accusations; issue notices of hearings, statements to respondent and statements of issues; receive and file notices of defense; determine the time and place of hearings under Section 11508 of the Government Code; issue subpoenas and subpoenas duces tecum; set and calendar cases for hearing and perform other functions necessary to the efficient dispatch of the business of the Board in connection with proceedings under the provisions of Section 11500 through 11528 of the Government Code, prior to the hearing of such proceedings; to approve settlement agreements for the revocation, surrender or interim suspension of a license; and the certification and delivery or mailing of copies of decisions under Section 11518 of said code are hereby delegated to and conferred upon the executive officer, or, in the absence of the executive officer from the office of the Board, the assistant executive officer.