Board meeting quorum rules require one third of total board strength or two directors, excluding interested directors. The section fixes Board meeting quorum as the greater of one third of the Board's total strength (fractions rounded up) or two directors; 'total strength' excludes current vacancies and 'interested directors' are disqualified from counting. If interested directors equal or exceed two thirds of total strength, the quorum becomes the number of non interested directors present, which must be at least two.