In the case of any disagreement between the two Houses of Congress with respect to a concurrent resolution passed by both Houses, conferees shall be promptly appointed and the committee of conference shall make and file a report with respect to such concurrent resolution within six calendar days after the legislation is referred to the committee of conference. Notwithstanding any rule in either House concerning the printing of conference reports in the Record or concerning any delay in the consideration of such reports, such report shall be acted on by both Houses not later than six calendar days after the conference report is filed. In the event the conferees are unable to agree within 48 hours, they shall report back to their respective Houses in disagreement.