This rule does not apply to the membership practices of social fraternities and sororities which are exempt from taxation under Section 501(a) of the Internal Revenue Code of 1954, the active membership of which consists of students at institutions of higher education.
This rule does not prohibit the occasional holding of special events organized for members of one sex, such as father-son, mother-daughter dinners.
This rule does not prohibit the single-sex membership practices of The Girl Scouts, Boy Scouts, Young Men's Christian Association, Young Women's Christian Association, Boys State, Girls State, or other such groups which may use the facilities of the educational institution.
94- 348 C.M.R. ch. 4, § 20