If a member is directly or indirectly interested in any contract, proposed contract or other matter before the Board and is present at a meeting on the Board at which the contract, proposed contract or other matter is the subject of consideration, he shall, at the meeting and as soon as reasonably practicable after the commencement thereof, disclose the fact and shall not take part in the consideration or discussion of, or vote on, any questions with respect to the contract or other matter, or be counted in the quorum of the meeting during consideration of the matter.