29. In the case of a motion contemplated in paragraph d, f, r or x of section 21, one member constitutes a quorum.
In the case of an appeal contemplated in paragraph e, h, h.1, j, k.1, s, t or w of section 21, two members constitute a quorum.
In the case of an appeal contemplated in paragraph f.1, g, j.1, l or aa of section 21 or of a motion contemplated in paragraph z of the said section, three members, including one assessor who is a physician, constitute a quorum.
1974, c. 39, s. 27; 1975, c. 64, s. 13; 1978, c. 7, s. 109; 1979, c. 85, s. 91; 1979, c. 63, s. 280; 1980, c. 33, s. 9; 1985, c. 23, s. 9; 1992, c. 21, s. 139.