A party adversely affected by a decision may move for rehearing if such motion is filed within ten (10) days of the time the decision of the board is mailed to him. If requested in the motion, the matter may be determined by the entire board of tax appeals. If a rehearing by the entire board is requested, it will be conducted at a regular meeting in Boise or a meeting convened for that purpose in Ada county or such other place as may be designated by the chairman.