California Code, Civil Code - CIV § 4706

(a) Except as restricted in Section 1940.5,  1 no governing document shall limit or prohibit the display of one or more religious items on the entry door or entry door frame of the member's separate interest.

(b) If an association is performing maintenance, repair, or replacement of an entry door or door frame that serves a member's separate interest, the member may be required to remove a religious item during the time the work is being performed.  After completion of the association's work, the member may again display or affix the religious item.  The association shall provide individual notice to the member regarding the temporary removal of the religious item.