In order to  break  the  conflict between the  proposed  heading  "Levin,  Yisra'el" and the identical 400 on the record for "Levin, Israel", one should add a  date qualifier to  the latter.  The  date needs to  be added only to the otherwise conflicting ref, not  to  the heading and other refs  in  that record.  Breaking  a  conflict  with  a  date  is  preferable to breaking  it  with  any  other  type  of qualifier,  including $c-types like  "'o.  d.," though these have their place  if dates are not available.

In another case, it turned out that "Ish Shalom, Mordekhai" normalizes to the same thing as another heading, so the  qualifier
"rav di-k.k. Teth" was added to that ref only. 

While  the  order  of qualifiers is supplied  in  Chapter 22,  the instruction to  add distinguishing info  to  the  ref. is found in RI26.2C "See also" references. LCRI 22.17-22.20, p.  1  gives the  order  of preference for  breaking conflicts.