California Health and Safety Code 11357
11357. (a) Except as authorized by law, every person who possesses any concentrated cannabis shall be punished by imprisonment in the county jail for a period of not more than one year or by a fine of not more than five hundred dollars ($500), or by both such fine and
imprisonment, or shall be punished by imprisonment in the state prison.
(b) Except as authorized by law, every person who possesses not more than 28.5 grams of marijuana, other than concentrated cannabis, is guilty of a misdemeanor and shall be punished by a fine of not more than one hundred dollars ($100). Notwithstanding other
provisions of law, if such person has been previously convicted three or more times of an offense described in this subdivision during the two-year period immediately preceding the date of commission of the violation to be charged, the previous convictions shall also be
charged in the accusatory pleading and, if found to be true by the jury upon a jury trial or by the court upon a court trial or if admitted by the person, the provisions of Sections 1000.1 and 1000.2 of the Penal Code shall be applicable to him, and the court shall divert and refer him for education, treatment, or rehabilitation, without a court hearing or determination or the concurrence of the district attorney, to an appropriate community program which will accept him. If the person is so diverted and referred he shall not be subject to the fine specified in this subdivision. If no community program will accept him, the person shall be subject to the fine specified in this subdivision. In any case in which a person is arrested for a violation of this subdivision and does not demand to be taken before a magistrate, such person shall be released by the arresting officer upon presentation of satisfactory evidence of identity and giving his written promise to appear in court, as provided in Section 853.6 of the Penal Code, and shall not be subjected to booking.
(c) Except as authorized by law, every person who possesses more than 28.5 grams of marijuana, other than concentrated cannabis, shall be punished by imprisonment in the county jail for a period of not more than six months or by a fine of not more than five hundred dollars ($500), or by both such fine and imprisonment.
(d) Except as authorized by law, every person 18 years of age or over who possesses not more than 28.5 grams of marijuana, other than concentrated cannabis, upon the grounds of, or within, any school providing instruction in kindergarten or any of grades 1 through 12 during hours the school is open for classes or school-related programs is guilty of a misdemeanor and shall be punished by a fine of not more than five hundred dollars ($500), or by imprisonment in the county jail for a period of not more than 10 days, or both.
(e) Except as authorized by law, every person under the age of 18 who possesses not more than 28.5 grams of marijuana, other than concentrated cannabis, upon the grounds of, or within, any school providing instruction in kindergarten or any of grades 1 through 12 during hours the school is open for classes or school-related programs is guilty of a misdemeanor and shall be subject to the following dispositions:
(1) A fine of not more than two hundred fifty dollars ($250), upon a finding that a first offense has been committed.
(2) A fine of not more than five hundred dollars ($500), or commitment to a juvenile hall, ranch, camp, forestry camp, or secure juvenile home for a period of not more than 10 days, or both, upon a finding that a second or subsequent offense has been committed.