What is the notice requirement for filing a SERNA motion in CA?

Agree with my colleagues. It should be filed 10 days before the hearing.

Here is the language of Rule 4.111: all pretrial motions, accompanied by a memorandum, must be served and filed at least 10 court days, all papers opposing the motion at least 5 court days, and all reply papers at least 2 court days before the time appointed for hearing. Proof of service of the moving papers must be filed no later than 5 court days before the time appointed for hearing. This means COURT, not calendar, days. Also, you have to file the proof of service no later than 5 COURT days before the hearing.

A serna motion can be brought on the spot orally without notice. HOWEVER, it's best to file a points and authorities 10 court days in advance.