"Want's federal-state court directory" OCLC # 10296033 is a CONSER blessed record.  With the 2007 edition of this title, it is now no longer published by Want's but by CQ Press and the title is "Federal-state court directory" and the cover clearly says "formerly Want's federal-state court directory."  For some time, there has been a variant title for this shorter title to allow searching without the publisher's name.

Per 21.2C2a in AACR2 "Consider as a major change in title proper a change in a corporate body name given anywhere in the title if it is a different corporate body." I'm not sure this counts, since the new corporate body is not present in the title, just having the old corporate body dropped. However, this is a change in the first 5 words. If it were the same corporate body, I'd look at 21.2C2b iii - deletion of name of same corporate body is a minor change.  Also, there is a statement: "In case of doubt, consider the change to be a minor change."

In the LCRIs, under 21.2C2 - "In applying category b)iii), if the change is in the name of a body that is part of the title proper and the change requires the creation of a new heading for the body, consider such a change to be a major change."  I got the feeling this was more for the presence of a corporate body, not the deletion of the old corporate body.

I'm thinking this is a major change, however, I'm not very experienced in this, so I'd like someone with some experience to give me some confirmation.  Any help out there?