Alternate Members. Alternate members shall be designated at the time of their appointment as "Alternate No. 1," "Alternate No. 2," "Alternate No. 3," and "Alternate No. 4." Alternate members may participate in the discussions of the proceedings but may not vote except in the absence or disqualification of a regular member. A vote shall not be delayed in order that a regular member may vote instead of an alternate member. In the event that a choice must be made as to which alternate is to vote, the alternate member having the lower numerical designation shall vote.