Is a newly enacted section of the Penal Code retroactive?

Pursuant to section 3, newly enacted sections of the Penal Code are presumed to operate prospectively. "No part of the Penal Code 'is retroactive, unless expressly so declared.' ( 3.) '[T]he language of section 3 erects a strong presumption of prospective operation, codifying the principle that, "in the absence of an express retroactivity provision, a statute will not be applied retroactively unless it is very clear from extrinsic sources that the [lawmakers] . . . must have intended a retroactive application." [Citations.] Accordingly, '"a statute that is ambiguous with respect to retroactive application is construed . . . to be unambiguously prospective.'"'" (People v. Buycks (2018) 5 Cal.5th 857, 880.)