Generally do not record a subtitle in 246 field.
Reason: The subtitle may subject to change. It's easy for non-PCC member to add a new MARC field for a subtitle as needed for identification and access. But non-PCC member can't modify or delete 246 in a PCC record if the subtitle changed at the time the book published.
Record edition statement only when it appears in TP plus page top gallery. Ignore series statement if appears in data view and TP plus bottom gallery.
Reason: It's easy for non-PCC member to add a new MARC field for edition statement if present in publication, but non-PCC member can't modify or delete any fields in a PCC record if not presented.
LC CIP prefers to use the copyright date in the galley. See CIP presentation at CIP Advisory Group meeting at ALA 2013 Annual Conference, p. 6: "Prefer to use the date from the galley and bracket the date in the 264 field if only the Copyright date is found"
264 1 Oakland, California : ǂb University of California Press, ǂc 
264 4 ǂc ©2017
UCSD Local Practice: Supply if readily available regardless of the presence of publication and/or distribution dates.
Record series statement only when it appears in TP plus page top gallery. Ignore series statement if appears in data view and TP plus bottom gallery.
LC practice: If the series statement appears only on the CIP data sheet or the ECIP data view at galley stage, do not transcribe this information as a series statement; do not contact CIP staff or the publisher. (LC-PCC PS 18.104.22.168 on Source of Information)
Reason: It's easy for non-PCC member to add a new MARC field for series statement if present in publication, but non-PCC member can't modify or delete any fields in a PCC record if not presented.
670 ## [Title, Date]: $b ECIP title page (…) data view (…)
Cite the name in the 670 in the way it appears on the source. It is only necessary to cite the name from the Data View if the form differs from that on the title page galley.
Example: ECIP title page (Courtney Handman) data view (Handman, Courtney Jill; birth date May 27, 1975)
To facilitate international contribution and use of authority records, when recording dates, generally use the spelled out or abbreviated forms for months as the U.S. practice for recording dates using numerals differs from the practice in some other countries (DCM Z1 on recording date in 670).
Example: In data view: "Birth Date: 5/27/75"; in 670: data view (... birth date May 27, 1975)