Penal Code §462.5
(a) Except in unusual cases where the interests of justice would best be
served if the person is granted probation, probation shall not be granted
to any person who is convicted of a felony custodial institution burglary.
In any case in which a person is convicted of a misdemeanor custodial
institution burglary, such person shall be confined in the county jail
for not less than 90 days nor more than one year except in unusual cases
where the interests of justice would best be served by the granting of
probation.
(b) As used in this section, “custodial institution burglary”
shall mean a violation of Section 459 on the grounds of any jail or correctional
institution with the intent to steal items to use or convert for use as
weapons, escape tools, or intoxicating drugs.
(c) If the court grants probation under subdivision (a), it shall specify
the reason or reasons for such order on the court record.
(d) Any person convicted of custodial institution burglary shall serve
his or her sentence, including enhancements, consecutive to any other
sentence in effect or pending. The felony sentence shall be calculated
under Section 1170.1. [Added by Stats. 1982, Ch. 1132, Sec. 1]