California Code, Streets and Highways Code - SHC § 8045

(a) Such protests are not signed by the owners of a majority of the property fronting on the street or portion thereof on which such change or modification of grade is proposed to be made; or

(b) The proposed change or modification of grade extends for a distance of not more than one block, and the grade of such street for at least one block thereof immediately adjacent to the block in which such change or modification of grade is proposed to be made, on each side thereof, has already been established; or

(c) The proposed change or modification of grade extends for a distance of not more than one block at the end of a street, and the grade thereof for at least one block thereof immediately adjacent to such block has already been established, the city council shall thereupon fix a time for hearing such protests, which time shall be not less than 10 days after the meeting of the council at which such time is so fixed.