Cal. Sts. & High. Code § 8625

If bonds can not be issued upon the security of any particular unpaid assessments because of a restraining order, injunction or other cause not applicable to other unpaid assessments, the issuance of bonds upon the security of the assessments not affected by such restraining order, injunction or other cause, shall not be delayed, and such bonds may be issued in advance of the issuance of the bonds so affected.