The California General Corporation Law recognizes three subsets of a "reorganization" - a "merger reorganization", an "exchange reorganization", or "sale-of-assets reorganization". Cal. Corp. Code § 181. Chapter 11 of the GCL authorizes and specifies the procedures and effects of mergers. Chapter 12 concerns the board and shareholder approval requirements pertaining to reorganizations.
In the case of a merger, Section 1101 requires the board of each corporation that desires to merger to approve an "agreement of merger" and specifies the content of the agreement. Somewhat inconsistently, Section 1200 specifies only that the board of each constituent corporation in a merger reorganization must approve the "reorganization". Sections 1201 and 1202 specify the circumstances when shareholder approval of a reorganization is required. Unless an exception is available, these statutes requires the approval not of the agreement of merger or the reorganization, but of its "principal terms".
It is interesting to compare these provisions to Section 251(c) of the Delaware General Corporation Law which quite specifically requires that the agreement of merger be submitted to the stockholders.