California Codes, Business and Professions Code - BPC, General Provisions, Section 16
The singular number includes the plural, and the plural the singular.
Notes
Defines singular and plural usage so a singular term includes the plural and a plural term includes the singular. The provision supplies a default construction rule for interpreting number throughout the code and does not itself impose a licensing requirement, professional duty, penalty, deadline, fee, or exception.
Use as reference
Lexinter.net | California Code, Business and Professions Code - BPC § 16 | https://laws.lexinter.net/codes/california/business-and-professions-code/general-provisions/section-16