if they say "no roosters" ... and you have neighbors ... and you're in California, especially Monterey area ... it probably means what it says, even if it doesn't make sense ....
("but Captain, that is not logical" ... )
many zoning laws and covenants don't make sense ... but those who got them put into place tend to enforce them anyway
I have never yet heard a rooster who didn't SOUND like a rooster ... that crow is pretty distinctive, no matter what volume
now, you can find out who or what got that regulation put in place, and find out what the objection is (and possibly get an exception made)
or you can fight it
or defy it
or keep the roo indoors inside a semi-soundproof structure
(like I'm going to keep my hatching chicks inside)
or play loud rock music to drown him out (and maybe incur other violations ... )
we live in a no-shooting zone but would occasionally need to discharge a test firearm ... we would first start playing the "1812 Overture" ... LOL
however, you might well wind uo with trouble on your hands
wishing you the best
Candy