...
All BSR records carry the encoding level “blank.”” Code 4, core-level, was encouraged at one time but is now extinct. We must use "blank" for PCC.
Authority control:
PCC standards require that all access points in a PCC BIBCO standard record be under authority control and that all applicable authority records conform to RDA. Create or update authority headings according to NACO guidelines.
...
LTS catalogers should not trace series. Record the series as it appears on the piece as 490:0 :, and do not give an 8XX.
Record upgrades:
Existing records may be upgraded to the BIBCO standard, if it is desirable in the cataloger's judgement.
These include:
...