(a) A quorum for the transaction of business consists of 9 members of the Board entitled to vote. An affirmative vote of at least 5 members of the quorum is required to take any action that the Board has the power to take, unless otherwise expressly provided in this chapter, including the express provisions in subsection (b) of this section.(b) An affirmative vote of at least 7 members of the Board present and voting at a meeting is required to adopt a regulation which can deprive a physician of the physician's certificate to practice medicine or subject a physician to disciplinary action.60 Del. Laws, c. 462, § 1; 61 Del. Laws, c. 68, § 1; 67 Del. Laws, c. 226, §6; 70 Del. Laws, c. 186, § 1; 75 Del. Laws, c. 141, § 1.;