The terms grow out of debate. Many of the people interested in parliamentary procedure have also been interested in argumentation and debate. Just thought I'd mention it. Now one member objects. By majority vote, it was agreed meetings would not be taped.
Minority still wishes to tape meetings to verify accuracy of proceedings.
As far as I know, the answer is not in Robert's Rules of Order Newly Revised, nor in any of the other standard parliamentary procedure authorities. As the communications technologies become more and more omnipresent, probably 21st Century editions will have to cover such topics, including e-mail virtual meetings and so forth. However, within the limits of what you said, it seems to me to have been properly handled. In this case, when the practice was challenged, it was proper to put the matter to a vote of the group, which could either be a direct motion or as an appeal from a decision of the chair to allow the practice. In either event, a majority vote would be all that is required for adoption.