Condo documents define who the trustees are and how many trustees are needed to govern the condo association. In small associations (four or fewer units) the condo docs often specify that all of the unit owners are automatically trustees. In larger associations, most trustees are elected by vote of the unit owners.
PERSPECTIVE:
Despite the fact that the signing of a 6d is just another business transaction within the real estate transaction, it can get interesting when the people that need to sign aren't fond of the people that are leaving. I've seen cases where a trustee refused to sign until the seller's attorney pointed out that, as trustees, they were legally obligated to sign or they would get sued for causing the seller's lost sale by refusing to sign.
Allow plenty of time (about 3 weeks, if possible) to get a 6d signed. It can often be a challenge to get the required signatures in a smaller association that lacks professional management, especially around holidays and vacation time. Fees and assessments due through the closing date should be paid well in advance so that the trustees can certify that they are paid on the 6d certificate.
Anyone have tales of 6D hassles?