California Senator Carol Liu (25th District) has sponsored CA SB 608. The Bill seeks to modify 647(e) (see bolded text below) and add new text.
647(e) Who lodges in any building, structure, vehicle, or place
whether public or private, without the permission of the owner or
person entitled to the possession or in control of it. This subdivision
does not apply to conduct that is protected pursuant to Section
53.81 of the Civil Code.
The new text, 53.8 and 53.81, contains classifications and protections intended to defend the rights of homeless people.