Where verified statements are filed asserting rights to an aggregate of more than twenty mining claims, any single hearing shall be limited to a maximum of twenty mining claims unless the parties affected shall otherwise stipulate and as many separate hearings shall be set as shall be necessary to comply with section 5(c) of the Act. If at any time prior to a hearing the department or agency requesting publication of notice and any person filing a verified statement pursuant to such notice shall so stipulate, then to the extent so stipulated, but only to such extent, no hearing shall be held with respect to rights asserted under that verified statement, and to the extent defined by the stipulation the rights asserted under that verified statement shall be deemed to be unaffected by the notice published pursuant to that request.