California Codes, Code of Civil Procedure - CCP, Part 2 — Of Civil Actions, Title 5 — Jurisdiction and Service of Process, Chapter 4 — Service of Summons, Article 4 — Persons Upon Whom Summons May Be Served, Section 416.90
A summons may be served on a person not otherwise specified in this article by delivering a copy of the summons and of the complaint to such person or to a person authorized by him to receive service of process.
Notes
Allows service of a summons on a person not otherwise covered by this article by delivering the summons and complaint directly to that person or to someone the person has authorized to receive service of process. The provision supplies those two service options and states no additional deadline, recipient category, or exception.
Use as reference
Lexinter.net | California Code, Code of Civil Procedure - CCP § 416.90 | https://laws.lexinter.net/codes/california/code-of-civil-procedure/part-2/title-5/chapter-4/article-4/section-416-90