From the recent round of MARBI proposals, no. 2008-07 proposes to simplify the series statment.
“SUMMARY: This paper proposes making field 440 obsolete in favor of using 490 (Series Statement) and the 8XX Series added entry fields for traced series. This simplifies practices and the need for systems to look multiple places in the records for the authorized series heading. The paper also proposes changes to the first indicator value 1 definition in field 490.“