(b) A public agency may regulate the placement and use of equipment necessary for broadcasting, photographing, filming or recording a meeting, so as to prevent undue interference with the meeting. The public agency shall allow the equipment to be placed within the meeting room in such a way as to permit its intended use, and the ordinary use of the equipment may not be declared to constitute undue interference: Provided, That if the public agency, in good faith, determines that the size of the meeting room is such that all the members of the public present and the equipment and personnel necessary for broadcasting, photographing, filming and tape-recording the meeting cannot be accommodated in the meeting room without unduly interfering with the meeting and an adequate alternative meeting room is not readily available, then the public agency, acting in good faith and consistent with the purposes of this article, may require the pooling of the equipment and the personnel operating it.