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.